diff --git a/src/app/(campaign)/campanha/(app)/contatos/formActions.ts b/src/app/(campaign)/campanha/(app)/contatos/formActions.ts
index e26c8365..bc937aa8 100644
--- a/src/app/(campaign)/campanha/(app)/contatos/formActions.ts
+++ b/src/app/(campaign)/campanha/(app)/contatos/formActions.ts
@@ -1,6 +1,10 @@
 'use server'
 
-import { createContact, updateContactField } from '@/app/(campaign)/campanha/actions/contact'
+import {
+  createContact,
+  updateContactField,
+  updateContactFull,
+} from '@/app/(campaign)/campanha/actions/contact'
 import {
   nullableFormText,
   repeatedPhoneFormValues,
@@ -89,11 +93,17 @@ export const createContactFormAction = async (
 ): Promise<CampaignFormActionState> =>
   runCampaignFormAction({
     execute: async () => {
-      const phone = nullableFormText(formData, 'phone')
+      // The desktop row sends one `phone`; the mobile sheet sends the
+      // repeatable `phones` list (PhonesFieldEditor) — the row wins when both
+      // are present, but the two forms never send both.
+      const singlePhone = nullableFormText(formData, 'phone')
+      const phonesList = repeatedPhoneFormValues(formData, 'phones')
+      const phones = phonesList.length > 0 ? phonesList : singlePhone ? [singlePhone] : []
       const result = await createContact({
         name: requiredFormText(formData, 'name'),
         email: nullableFormText(formData, 'email') ?? undefined,
-        phones: phone ? [phone] : [],
+        phones,
+        gender: nullableFormText(formData, 'gender') ?? undefined,
         state: requiredFormText(formData, 'state'),
         city: nullableFormText(formData, 'city') ?? undefined,
         postalCode: nullableFormText(formData, 'postalCode') ?? undefined,
@@ -103,3 +113,26 @@ export const createContactFormAction = async (
     safeMessages: [CONTACT_NAME_CONFLICT_MESSAGE],
     genericMessage: 'Não foi possível criar o contato. Verifique os dados e tente novamente.',
   })
+
+/** The mobile edit sheet's single atomic ficha write (plan decision F). */
+export const updateContactFullFormAction = async (
+  _state: CampaignFormActionState,
+  formData: FormData,
+): Promise<CampaignFormActionState> =>
+  runCampaignFormAction({
+    execute: async () => {
+      await updateContactFull({
+        id: requiredRelationshipFormValue(formData, 'id'),
+        name: requiredFormText(formData, 'name'),
+        email: nullableFormText(formData, 'email') ?? undefined,
+        phones: repeatedPhoneFormValues(formData, 'phones'),
+        gender: nullableFormText(formData, 'gender') ?? undefined,
+        state: requiredFormText(formData, 'state'),
+        city: nullableFormText(formData, 'city') ?? undefined,
+        postalCode: nullableFormText(formData, 'postalCode') ?? undefined,
+      })
+      return { message: 'Salvo.' }
+    },
+    safeMessages: contactCellSafeMessages,
+    genericMessage: 'Não foi possível salvar. Verifique os dados e tente novamente.',
+  })
diff --git a/src/app/(campaign)/campanha/(app)/contatos/page.tsx b/src/app/(campaign)/campanha/(app)/contatos/page.tsx
index e56629e1..7a1db262 100644
--- a/src/app/(campaign)/campanha/(app)/contatos/page.tsx
+++ b/src/app/(campaign)/campanha/(app)/contatos/page.tsx
@@ -2,11 +2,12 @@ import config from '@payload-config'
 import { MessageCircleIcon, SearchXIcon } from 'lucide-react'
 import { redirect } from 'next/navigation'
 import { getPayload } from 'payload'
-import type { ReactNode } from 'react'
 
+import { ContactCreateFab } from '@/components/campaign/contacts/ContactCreateFab'
 import { ContactCreateRow } from '@/components/campaign/contacts/ContactCreateRow'
 import { ContactCreateProvider } from '@/components/campaign/contacts/ContactCreateState'
 import { ContactFilters } from '@/components/campaign/contacts/ContactFilters'
+import { ContactMobileList } from '@/components/campaign/contacts/ContactMobileList'
 import { ContactPhonesCell } from '@/components/campaign/contacts/ContactPhonesCell'
 import { ContactSelectCell } from '@/components/campaign/contacts/ContactSelectCell'
 import { ContactSortableHead } from '@/components/campaign/contacts/ContactSortableHead'
@@ -20,6 +21,7 @@ import {
   CampaignListResults,
   CampaignTransitionAnchor,
 } from '@/components/campaign/shared/CampaignListPending'
+import { CampaignListSheetProvider } from '@/components/campaign/shared/CampaignListSheetHost'
 import {
   CampaignTable,
   CampaignTableHead,
@@ -38,7 +40,7 @@ import {
 import { toCampaignColumnPickerColumns } from '@/lib/campaignColumnVisibility'
 import { campaignPageMetadataFromCatalog } from '@/lib/campaignPageChrome'
 import { CitiesByState } from '@/lib/cities'
-import { formatBrazilianPhoneInput, whatsAppHrefForPhone } from '@/lib/phone'
+import { whatsAppHrefForPhone } from '@/lib/phone'
 import { cn } from '@/lib/utils'
 import { isCampaignUnrestricted } from '@/utilities/campaignAccess'
 import { readCampaignColumnVisibility } from '@/utilities/campaignColumnVisibilityCookie'
@@ -279,62 +281,6 @@ const contactsColumns = ({
   },
 ]
 
-/** Fase 4 interim mobile list — replaced by the cards/sheets in Fase 5. */
-const ContactsMobileList = ({
-  rows,
-  canDelete,
-  empty,
-}: {
-  rows: readonly ContactRowViewModel[]
-  canDelete: boolean
-  empty: ReactNode
-}) => (
-  <ul data-view="mobile-list" className="flex flex-col divide-y md:hidden">
-    {rows.length === 0 ? (
-      <li className="py-4">{empty}</li>
-    ) : (
-      rows.map((row) => {
-        const whatsAppHref = whatsAppHrefForPhone(row.phones[0] ?? null)
-        return (
-          <li key={row.contactID} className="flex items-center justify-between gap-2 py-3">
-            <div className="min-w-0">
-              <p className="truncate font-medium">{row.name}</p>
-              <p className="truncate text-xs text-muted-foreground">
-                {row.phones[0]
-                  ? formatBrazilianPhoneInput(row.phones[0])
-                  : row.email
-                    ? row.email
-                    : 'Sem contato registrado'}
-              </p>
-            </div>
-            <div className="flex shrink-0 items-center gap-0.5">
-              {whatsAppHref ? (
-                <Button asChild variant="ghost" size="icon" className="size-10">
-                  <a
-                    href={whatsAppHref}
-                    target="_blank"
-                    rel="noopener noreferrer"
-                    aria-label={`Enviar WhatsApp para ${row.name}`}
-                  >
-                    <MessageCircleIcon className="size-4" aria-hidden="true" />
-                  </a>
-                </Button>
-              ) : null}
-              {canDelete ? (
-                <DeletePersonButton
-                  personName={row.name}
-                  contactId={row.contactID}
-                  vocabulary="contato"
-                />
-              ) : null}
-            </div>
-          </li>
-        )
-      })
-    )}
-  </ul>
-)
-
 export default async function ContactsPage({ searchParams }: ContactsPageProps) {
   const rawSearchParams = await searchParams
   const canonicalUrl = resolveContactListUrl(rawSearchParams)
@@ -373,46 +319,49 @@ export default async function ContactsPage({ searchParams }: ContactsPageProps)
   return (
     <CampaignPageShell>
       <ContactCreateProvider>
-        <CampaignListPendingBoundary>
-          <ContactFilters
-            state={state}
-            cityFilterOptions={cityFilterOptions}
-            trailing={
-              <CampaignColumnPickerTrailing
-                columnVisibility={columnVisibility}
-                columns={toCampaignColumnPickerColumns(columns)}
-              />
-            }
-          />
+        <CampaignListSheetProvider>
+          <CampaignListPendingBoundary>
+            <ContactFilters
+              state={state}
+              cityFilterOptions={cityFilterOptions}
+              trailing={
+                <CampaignColumnPickerTrailing
+                  columnVisibility={columnVisibility}
+                  columns={toCampaignColumnPickerColumns(columns)}
+                />
+              }
+            />
 
-          <CampaignListResults>
-            <ContactsMobileList
-              rows={listData.rows}
-              canDelete={canDelete}
-              empty={<ContactsListEmptyState hasFilters={hasFilters} state={state} />}
-            />
-            <ContactCreateRow formAction={createContactFormAction} />
-            <CampaignTable
-              className="hidden md:block"
-              caption="Uma linha por ficha de contato da campanha. Edite direto na célula; o telefone principal é o primeiro da lista."
-              columns={columns}
-              columnVisibility={columnVisibility}
-              rows={listData.rows}
-              rowKey={(row) => row.contactID}
-              empty={<ContactsListEmptyState hasFilters={hasFilters} state={state} />}
-            />
-            {listData.rows.length ? (
-              <CampaignListFooter
-                totalDocs={listData.totalDocs}
-                singular="contato"
-                plural="contatos"
-                page={state.page}
-                totalPages={listData.totalPages}
-                hrefForPage={(page) => buildContactListHref(state, page)}
+            <CampaignListResults>
+              <ContactMobileList
+                rows={listData.rows}
+                canDelete={canDelete}
+                empty={<ContactsListEmptyState hasFilters={hasFilters} state={state} />}
               />
-            ) : null}
-          </CampaignListResults>
-        </CampaignListPendingBoundary>
+              <ContactCreateRow formAction={createContactFormAction} />
+              <CampaignTable
+                className="hidden md:block"
+                caption="Uma linha por ficha de contato da campanha. Edite direto na célula; o telefone principal é o primeiro da lista."
+                columns={columns}
+                columnVisibility={columnVisibility}
+                rows={listData.rows}
+                rowKey={(row) => row.contactID}
+                empty={<ContactsListEmptyState hasFilters={hasFilters} state={state} />}
+              />
+              {listData.rows.length ? (
+                <CampaignListFooter
+                  totalDocs={listData.totalDocs}
+                  singular="contato"
+                  plural="contatos"
+                  page={state.page}
+                  totalPages={listData.totalPages}
+                  hrefForPage={(page) => buildContactListHref(state, page)}
+                />
+              ) : null}
+            </CampaignListResults>
+          </CampaignListPendingBoundary>
+          <ContactCreateFab />
+        </CampaignListSheetProvider>
       </ContactCreateProvider>
     </CampaignPageShell>
   )
diff --git a/src/app/(campaign)/campanha/actions/contact.ts b/src/app/(campaign)/campanha/actions/contact.ts
index 8934c618..e6834451 100644
--- a/src/app/(campaign)/campanha/actions/contact.ts
+++ b/src/app/(campaign)/campanha/actions/contact.ts
@@ -9,8 +9,10 @@ import {
   CONTACT_CREATE_STAFF_MESSAGE,
   contactCreateSchema,
   contactFieldUpdateSchema,
+  contactFullUpdateSchema,
   type ContactCreateInput,
   type ContactFieldUpdateInput,
+  type ContactFullUpdateInput,
 } from '@/lib/schemas/contact'
 import type { CampaignUser, Contact } from '@/payload-types'
 import { isCampaignUnrestricted } from '@/utilities/campaignAccess'
@@ -172,3 +174,47 @@ export const updateContactField = async (input: unknown) => {
   await updateContactFieldRecord(payload, actor, input as ContactFieldUpdateInput)
   revalidatePath('/campanha/contatos', 'page')
 }
+
+/**
+ * C139 — the mobile sheet's single atomic ficha write (plan decision F): one
+ * transaction, same gate ("edita o que vê") and same name invariant as the
+ * per-field ladder; every column is written from the form (empties clear).
+ */
+const updateContactFullRecord = async (
+  payload: Payload,
+  actor: CampaignUser,
+  input: ContactFullUpdateInput,
+): Promise<void> => {
+  const data = contactFullUpdateSchema.parse(input)
+
+  return withPayloadTransaction(payload, async ({ req }) => {
+    const currentActor = await reloadStaffActor(payload, actor, CONTACT_CELL_STAFF_MESSAGE, req)
+
+    await assertContactRowEditable(payload, currentActor, data.id, req)
+    await assertContactNameAvailable(payload, req, data.name, data.id)
+
+    // Intentional bypass: same gate as the per-field write above.
+    await payload.update({
+      collection: 'contact',
+      id: data.id,
+      data: {
+        name: data.name,
+        email: data.email ?? null,
+        phones: (data.phones ?? []).map((value) => ({ value })),
+        gender: data.gender ?? null,
+        state: data.state,
+        city: data.city ?? null,
+        postalCode: data.postalCode ?? null,
+      },
+      depth: 0,
+      overrideAccess: true,
+      req,
+    })
+  })
+}
+
+export const updateContactFull = async (input: unknown) => {
+  const { payload, actor } = await getCampaignActionContext()
+  await updateContactFullRecord(payload, actor, input as ContactFullUpdateInput)
+  revalidatePath('/campanha/contatos', 'page')
+}
diff --git a/src/components/campaign/contacts/ContactCreateFab.tsx b/src/components/campaign/contacts/ContactCreateFab.tsx
new file mode 100644
index 00000000..5c0bd97f
--- /dev/null
+++ b/src/components/campaign/contacts/ContactCreateFab.tsx
@@ -0,0 +1,32 @@
+'use client'
+
+import { PlusIcon } from 'lucide-react'
+
+import { createContactFormAction } from '@/app/(campaign)/campanha/(app)/contatos/formActions'
+import { ContactFormSheet } from '@/components/campaign/contacts/ContactFormSheet'
+
+/**
+ * C139 — the mobile create FAB (below `md`, same corner as the quick-actions
+ * FAB, which the staff contacts page deliberately does not mount): opens the
+ * create sheet — the same ficha form, empty, with the state defaulting to BA.
+ */
+export const ContactCreateFab = () => (
+  <ContactFormSheet
+    title="Novo contato"
+    description="Preencha a ficha da campanha"
+    trigger={<PlusIcon className="size-6" aria-hidden="true" />}
+    triggerLabel="Novo contato"
+    triggerClassName="fixed right-4 bottom-5 z-40 flex size-14 items-center justify-center rounded-full bg-primary text-primary-foreground shadow-lg md:hidden"
+    formAction={createContactFormAction}
+    defaults={{
+      name: '',
+      email: '',
+      phones: [],
+      gender: '',
+      state: 'BA',
+      city: '',
+      postalCode: '',
+    }}
+    successMessage="Contato criado."
+  />
+)
diff --git a/src/components/campaign/contacts/ContactCreateRow.tsx b/src/components/campaign/contacts/ContactCreateRow.tsx
index 093cd807..9fbf6520 100644
--- a/src/components/campaign/contacts/ContactCreateRow.tsx
+++ b/src/components/campaign/contacts/ContactCreateRow.tsx
@@ -1,7 +1,7 @@
 'use client'
 
 import { useRouter } from 'next/navigation'
-import { useActionState, useEffect, useRef, useState } from 'react'
+import { startTransition, useActionState, useEffect, useRef, useState, type FormEvent } from 'react'
 import { toast } from 'sonner'
 
 import { useContactCreate } from '@/components/campaign/contacts/ContactCreateState'
@@ -60,13 +60,22 @@ export const ContactCreateRow = ({ formAction }: ContactCreateRowProps) => {
 
   if (!open) return null
 
+  // C139 — manual dispatch (no `action={submitAction}`): React 19 resets
+  // uncontrolled fields after any settled form action, wiping the typed name
+  // on a validation/conflict error — the row stays open, so the wipe showed.
+  // `startTransition` keeps `isPending` correct for the imperative dispatch.
+  const handleSubmit = (event: FormEvent<HTMLFormElement>) => {
+    event.preventDefault()
+    startTransition(() => submitAction(new FormData(event.currentTarget)))
+  }
+
   return (
     <form
       ref={formRef}
-      action={submitAction}
+      onSubmit={handleSubmit}
       data-view="contact-create-row"
       aria-busy={isPending}
-      className="rounded-xl border border-dashed border-primary/40 bg-primary/5 p-3"
+      className="hidden rounded-xl border border-dashed border-primary/40 bg-primary/5 p-3 md:block"
     >
       <div className="flex flex-wrap items-end gap-3">
         <div className="flex min-w-40 flex-1 flex-col gap-1.5">
diff --git a/src/components/campaign/contacts/ContactFormFields.tsx b/src/components/campaign/contacts/ContactFormFields.tsx
new file mode 100644
index 00000000..487d50d4
--- /dev/null
+++ b/src/components/campaign/contacts/ContactFormFields.tsx
@@ -0,0 +1,221 @@
+'use client'
+
+import { startTransition, useState, type FormEvent } from 'react'
+
+import { PhonesFieldEditor } from '@/components/campaign/shared/PhonesFieldEditor'
+import { FieldError, FieldLabel } from '@/components/ui/field'
+import { Input } from '@/components/ui/input'
+import { CitiesByState } from '@/lib/cities'
+import type { CampaignFormActionState } from '@/utilities/campaignFormActionError'
+import { errorProps } from '@/utilities/campaignFormFields'
+import { contactGenderLabels } from '@/utilities/contacts/contactListUrl'
+
+export type ContactFormDefaults = {
+  name: string
+  email: string
+  phones: string[]
+  gender: string
+  state: string
+  city: string
+  postalCode: string
+}
+
+const stateOptions = Object.keys(CitiesByState)
+
+/**
+ * C139 — the mobile sheet's ficha form (edit and create share it; the create
+ * sheet passes empty defaults). Full-bleed fields with dividers; phones use
+ * `PhonesFieldEditor` in FORM mode (no `saveAction`), so the repeated `phones`
+ * inputs are collected by the enclosing form. Field errors come from the
+ * ladder's `fieldErrors` (name/email/phones/gender/state/city/postalCode);
+ * top-level ladder messages (name conflict, out of scope) render as a banner.
+ *
+ * The fields are CONTROLLED and the submit goes through a manual `onSubmit`
+ * dispatch instead of `<form action={submitAction}>`: React 19 resets
+ * uncontrolled form fields after any settled form action, wiping typed values
+ * on validation/conflict errors (the sheet stays open, so the wipe is visible).
+ * `preventDefault` keeps the native submit event away from that plumbing.
+ */
+export const ContactFormFields = ({
+  formId,
+  state,
+  sessionId,
+  submitAction,
+  defaults,
+  contactId,
+}: {
+  formId: string
+  state: CampaignFormActionState
+  /**
+   * Bumps on every sheet open; the fields drop the state from any PREVIOUS
+   * session with it (the sheet wrapper stays mounted, so `useActionState`
+   * state would otherwise leak a stale conflict banner into a fresh open).
+   */
+  sessionId: number
+  submitAction: (formData: FormData) => void
+  defaults: ContactFormDefaults
+  /** Edit mode: the record being updated (submitted as the `id` field). */
+  contactId?: string
+}) => {
+  const [lastSessionId, setLastSessionId] = useState(sessionId)
+  if (lastSessionId !== sessionId) setLastSessionId(sessionId)
+  const visibleState = lastSessionId === sessionId ? state : {}
+
+  const [name, setName] = useState(defaults.name)
+  const [email, setEmail] = useState(defaults.email)
+  const [gender, setGender] = useState(defaults.gender)
+  const [stateValue, setStateValue] = useState(defaults.state)
+  const [city, setCity] = useState(defaults.city)
+  const [postalCode, setPostalCode] = useState(defaults.postalCode)
+
+  const nameProps = errorProps(visibleState.fieldErrors, 'name', formId)
+  const emailProps = errorProps(visibleState.fieldErrors, 'email', formId)
+  const cityProps = errorProps(visibleState.fieldErrors, 'city', formId)
+  const postalCodeProps = errorProps(visibleState.fieldErrors, 'postalCode', formId)
+  const stateProps = errorProps(visibleState.fieldErrors, 'state', formId)
+  const genderProps = errorProps(visibleState.fieldErrors, 'gender', formId)
+
+  const handleSubmit = (event: FormEvent<HTMLFormElement>) => {
+    event.preventDefault()
+    // `startTransition` keeps `isPending` correct for the imperative dispatch
+    // (React warns otherwise) without re-entering the `<form action>` plumbing.
+    startTransition(() => submitAction(new FormData(event.currentTarget)))
+  }
+
+  return (
+    <form id={formId} onSubmit={handleSubmit} className="flex flex-col divide-y">
+      {contactId !== undefined ? <input type="hidden" name="id" value={contactId} /> : null}
+      {visibleState.fieldErrors?.id ? (
+        <FieldError id={`${formId}-id-error`}>{visibleState.fieldErrors.id[0]}</FieldError>
+      ) : null}
+      {visibleState.message ? (
+        <p role="alert" className="py-3 text-sm font-medium text-destructive">
+          {visibleState.message}
+        </p>
+      ) : null}
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-name`}>Nome *</FieldLabel>
+        <Input
+          id={`${formId}-name`}
+          name="name"
+          required
+          value={name}
+          onChange={(event) => setName(event.target.value)}
+          placeholder="Nome e sobrenome"
+          aria-invalid={nameProps.invalid}
+          aria-describedby={nameProps.describedBy}
+        />
+        {nameProps.error ? (
+          <FieldError id={nameProps.describedBy}>{nameProps.error}</FieldError>
+        ) : null}
+      </div>
+
+      <div className="py-3">
+        <PhonesFieldEditor
+          defaultValues={defaults.phones}
+          error={visibleState.fieldErrors?.phones}
+          label="Telefones"
+        />
+      </div>
+
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-email`}>E-mail</FieldLabel>
+        <Input
+          id={`${formId}-email`}
+          name="email"
+          type="email"
+          value={email}
+          onChange={(event) => setEmail(event.target.value)}
+          placeholder="nome@email.com"
+          aria-invalid={emailProps.invalid}
+          aria-describedby={emailProps.describedBy}
+        />
+        {emailProps.error ? (
+          <FieldError id={emailProps.describedBy}>{emailProps.error}</FieldError>
+        ) : null}
+      </div>
+
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-gender`}>Gênero</FieldLabel>
+        <select
+          id={`${formId}-gender`}
+          name="gender"
+          value={gender}
+          onChange={(event) => setGender(event.target.value)}
+          aria-invalid={genderProps.invalid}
+          aria-describedby={genderProps.describedBy}
+          className="min-h-10 w-full rounded-md border border-input bg-background px-3 text-sm focus-visible:ring-1 focus-visible:ring-ring focus-visible:outline-none"
+        >
+          <option value="">—</option>
+          {(Object.keys(contactGenderLabels) as (keyof typeof contactGenderLabels)[]).map(
+            (gender) => (
+              <option key={gender} value={gender}>
+                {contactGenderLabels[gender]}
+              </option>
+            ),
+          )}
+        </select>
+        {genderProps.error ? (
+          <FieldError id={genderProps.describedBy}>{genderProps.error}</FieldError>
+        ) : null}
+      </div>
+
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-city`}>Cidade</FieldLabel>
+        <Input
+          id={`${formId}-city`}
+          name="city"
+          value={city}
+          onChange={(event) => setCity(event.target.value)}
+          placeholder="Cidade"
+          aria-invalid={cityProps.invalid}
+          aria-describedby={cityProps.describedBy}
+        />
+        {cityProps.error ? (
+          <FieldError id={cityProps.describedBy}>{cityProps.error}</FieldError>
+        ) : null}
+      </div>
+
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-state`}>Estado *</FieldLabel>
+        <select
+          id={`${formId}-state`}
+          name="state"
+          required
+          value={stateValue}
+          onChange={(event) => setStateValue(event.target.value)}
+          aria-invalid={stateProps.invalid}
+          aria-describedby={stateProps.describedBy}
+          className="min-h-10 w-full rounded-md border border-input bg-background px-3 text-sm focus-visible:ring-1 focus-visible:ring-ring focus-visible:outline-none"
+        >
+          {stateOptions.map((stateKey) => (
+            <option key={stateKey} value={stateKey}>
+              {stateKey}
+            </option>
+          ))}
+        </select>
+        {stateProps.error ? (
+          <FieldError id={stateProps.describedBy}>{stateProps.error}</FieldError>
+        ) : null}
+      </div>
+
+      <div className="flex flex-col gap-1.5 py-3">
+        <FieldLabel htmlFor={`${formId}-postal-code`}>CEP</FieldLabel>
+        <Input
+          id={`${formId}-postal-code`}
+          name="postalCode"
+          inputMode="numeric"
+          maxLength={8}
+          value={postalCode}
+          onChange={(event) => setPostalCode(event.target.value)}
+          placeholder="00000000"
+          aria-invalid={postalCodeProps.invalid}
+          aria-describedby={postalCodeProps.describedBy}
+        />
+        {postalCodeProps.error ? (
+          <FieldError id={postalCodeProps.describedBy}>{postalCodeProps.error}</FieldError>
+        ) : null}
+      </div>
+    </form>
+  )
+}
diff --git a/src/components/campaign/contacts/ContactFormSheet.tsx b/src/components/campaign/contacts/ContactFormSheet.tsx
new file mode 100644
index 00000000..08af5bc8
--- /dev/null
+++ b/src/components/campaign/contacts/ContactFormSheet.tsx
@@ -0,0 +1,107 @@
+'use client'
+
+import { useRouter } from 'next/navigation'
+import { useActionState, useEffect, useId, useState, type ReactNode } from 'react'
+import { toast } from 'sonner'
+
+import {
+  ContactFormFields,
+  type ContactFormDefaults,
+} from '@/components/campaign/contacts/ContactFormFields'
+import { CampaignCellEditOverlay } from '@/components/campaign/shared/CampaignCellEditOverlay'
+import { Button } from '@/components/ui/button'
+import { DrawerCloseButton } from '@/components/ui/Drawer'
+import { Spinner } from '@/components/ui/Spinner'
+import type { CampaignFormActionState } from '@/utilities/campaignFormActionError'
+
+/**
+ * C139 — the mobile ficha sheet (edit card / create FAB): the shared
+ * `CampaignListSheetProvider` drawer via `CampaignCellEditOverlay`, the whole
+ * ficha as ONE form (plan decision F) and the custom footer submit. Success
+ * toasts, closes and refreshes; field errors render inline in the body.
+ */
+export const ContactFormSheet = ({
+  title,
+  description,
+  trigger,
+  triggerLabel,
+  triggerClassName,
+  formAction,
+  defaults,
+  successMessage,
+  deleteControl,
+  contactId,
+}: {
+  title: string
+  description?: string
+  trigger: ReactNode
+  triggerLabel: string
+  triggerClassName?: string
+  formAction: (
+    state: CampaignFormActionState,
+    formData: FormData,
+  ) => Promise<CampaignFormActionState>
+  defaults: ContactFormDefaults
+  successMessage: string
+  /** Rendered under the form, outside it (the destructive dialog, edit only). */
+  deleteControl?: ReactNode
+  /** Edit mode: the record being updated (submitted as the `id` field). */
+  contactId?: string
+}) => {
+  const router = useRouter()
+  const formId = useId()
+  const [open, setOpen] = useState(false)
+  const [openCount, setOpenCount] = useState(0)
+  const [formActionState, submitAction, isPending] = useActionState<
+    CampaignFormActionState,
+    FormData
+  >(formAction, {})
+
+  // Bump on every open so the fields can drop a PREVIOUS session's action
+  // state (the sheet wrapper stays mounted; useActionState does not reset).
+  useEffect(() => {
+    if (open) setOpenCount((count) => count + 1)
+  }, [open])
+
+  useEffect(() => {
+    if (formActionState.status !== 'success') return
+    toast.success(formActionState.message ?? successMessage)
+    setOpen(false)
+    router.refresh()
+  }, [formActionState, router, successMessage])
+
+  const footer = (
+    <div className="flex w-full flex-col gap-2">
+      <Button form={formId} type="submit" disabled={isPending} className="min-h-11 w-full">
+        {isPending ? <Spinner data-icon="inline-start" /> : null}
+        Salvar
+      </Button>
+      <DrawerCloseButton disabled={isPending}>Cancelar</DrawerCloseButton>
+    </div>
+  )
+
+  return (
+    <CampaignCellEditOverlay
+      variant="sheet"
+      open={open}
+      onOpenChange={setOpen}
+      title={title}
+      description={description}
+      trigger={trigger}
+      triggerLabel={triggerLabel}
+      triggerClassName={triggerClassName}
+      footer={footer}
+      sheetBodyClassName="gap-4"
+    >
+      <ContactFormFields
+        formId={formId}
+        state={formActionState}
+        sessionId={openCount}
+        submitAction={submitAction}
+        defaults={defaults}
+        contactId={contactId}
+      />
+      {deleteControl}
+    </CampaignCellEditOverlay>
+  )
+}
diff --git a/src/components/campaign/contacts/ContactMobileCard.tsx b/src/components/campaign/contacts/ContactMobileCard.tsx
new file mode 100644
index 00000000..21667f7a
--- /dev/null
+++ b/src/components/campaign/contacts/ContactMobileCard.tsx
@@ -0,0 +1,113 @@
+'use client'
+
+import { MailIcon, MessageCircleIcon, PencilIcon } from 'lucide-react'
+
+import { updateContactFullFormAction } from '@/app/(campaign)/campanha/(app)/contatos/formActions'
+import { ContactFormSheet } from '@/components/campaign/contacts/ContactFormSheet'
+import { DeletePersonButton } from '@/components/campaign/people/DeletePersonButton'
+import { Badge } from '@/components/ui/Badge'
+import { Button } from '@/components/ui/button'
+import { formatBrazilianPhoneInput, whatsAppHrefForPhone } from '@/lib/phone'
+import type { ContactRowViewModel } from '@/utilities/contacts/contactListData'
+import { contactGenderLabels } from '@/utilities/contacts/contactListUrl'
+
+const editTriggerClassName = 'size-10 rounded-full'
+
+/**
+ * C139 — the mobile ficha card (below `md`): name + secondary line (primary
+ * phone ?? e-mail), gender chip + "Cidade · Estado", and the actions row
+ * (WhatsApp / e-mail / edit / delete). Editing opens the shared ficha sheet.
+ */
+export const ContactMobileCard = ({
+  row,
+  canDelete,
+}: {
+  row: ContactRowViewModel
+  canDelete: boolean
+}) => {
+  const whatsAppHref = whatsAppHrefForPhone(row.phones[0] ?? null)
+  const secondary =
+    row.phones.length > 0
+      ? formatBrazilianPhoneInput(row.phones[0]!)
+      : (row.email ?? 'Sem contato registrado')
+  const place = [row.city, row.state].filter(Boolean).join(' · ')
+
+  return (
+    <li className="flex flex-col gap-2 py-4">
+      <div className="flex items-start justify-between gap-2">
+        <div className="min-w-0">
+          <p className="font-medium">{row.name}</p>
+          <p className="truncate text-xs text-muted-foreground">{secondary}</p>
+        </div>
+        <div className="flex shrink-0 items-center gap-0.5">
+          {whatsAppHref ? (
+            <Button asChild variant="ghost" size="icon" className="size-10">
+              <a
+                href={whatsAppHref}
+                target="_blank"
+                rel="noopener noreferrer"
+                aria-label={`Enviar WhatsApp para ${row.name}`}
+              >
+                <MessageCircleIcon className="size-4" aria-hidden="true" />
+              </a>
+            </Button>
+          ) : null}
+          {row.email ? (
+            <Button asChild variant="ghost" size="icon" className="size-10">
+              <a href={`mailto:${row.email}`} aria-label={`Enviar e-mail para ${row.name}`}>
+                <MailIcon className="size-4" aria-hidden="true" />
+              </a>
+            </Button>
+          ) : null}
+          {canDelete ? (
+            <DeletePersonButton
+              personName={row.name}
+              contactId={row.contactID}
+              vocabulary="contato"
+            />
+          ) : null}
+          <ContactFormSheet
+            title="Editar contato"
+            description={row.name}
+            trigger={<PencilIcon className="size-4" aria-hidden="true" />}
+            triggerLabel={`Editar contato ${row.name}`}
+            triggerClassName={editTriggerClassName}
+            formAction={updateContactFullFormAction}
+            contactId={String(row.contactID)}
+            defaults={{
+              name: row.name,
+              email: row.email ?? '',
+              phones: row.phones,
+              gender: row.gender ?? '',
+              state: row.state ?? 'BA',
+              city: row.city ?? '',
+              postalCode: row.postalCode ?? '',
+            }}
+            successMessage="Salvo."
+            deleteControl={
+              canDelete ? (
+                <div className="flex justify-center border-t pt-4">
+                  <DeletePersonButton
+                    personName={row.name}
+                    contactId={row.contactID}
+                    vocabulary="contato"
+                  />
+                </div>
+              ) : null
+            }
+          />
+        </div>
+      </div>
+      {row.gender || place ? (
+        <div className="flex flex-wrap items-center gap-1 text-xs text-muted-foreground">
+          {row.gender ? (
+            <Badge variant="outline" className="font-normal">
+              {contactGenderLabels[row.gender]}
+            </Badge>
+          ) : null}
+          {place ? <span>{place}</span> : null}
+        </div>
+      ) : null}
+    </li>
+  )
+}
diff --git a/src/components/campaign/contacts/ContactMobileList.tsx b/src/components/campaign/contacts/ContactMobileList.tsx
new file mode 100644
index 00000000..9ccb5044
--- /dev/null
+++ b/src/components/campaign/contacts/ContactMobileList.tsx
@@ -0,0 +1,24 @@
+'use client'
+
+import type { ReactNode } from 'react'
+
+import { ContactMobileCard } from '@/components/campaign/contacts/ContactMobileCard'
+import type { ContactRowViewModel } from '@/utilities/contacts/contactListData'
+
+/** C139 — the mobile ficha list (below `md`), replacing the interim one-liner. */
+export const ContactMobileList = ({
+  rows,
+  canDelete,
+  empty,
+}: {
+  rows: readonly ContactRowViewModel[]
+  canDelete: boolean
+  empty: ReactNode
+}) => (
+  <ul data-view="mobile-cards" className="flex flex-col divide-y md:hidden">
+    {rows.length === 0 ? <li className="py-4">{empty}</li> : null}
+    {rows.map((row) => (
+      <ContactMobileCard key={row.contactID} row={row} canDelete={canDelete} />
+    ))}
+  </ul>
+)
diff --git a/src/lib/schemas/contact.ts b/src/lib/schemas/contact.ts
index e30c56fc..b12ce36b 100644
--- a/src/lib/schemas/contact.ts
+++ b/src/lib/schemas/contact.ts
@@ -153,3 +153,39 @@ export const contactFieldUpdateSchema = z.discriminatedUnion('field', [
 ])
 
 export type ContactFieldUpdateInput = z.input<typeof contactFieldUpdateSchema>
+
+const contactGenderFieldSchema = z
+  .union([z.enum(contactGenders), z.literal('')])
+  .transform((value) => (value === '' ? undefined : value))
+  .optional()
+
+const contactCityFieldSchema = z
+  .string()
+  .trim()
+  .transform((value) => (value === '' ? undefined : value))
+  .refine((value) => value === undefined || (value.length >= 3 && value.length <= 100), {
+    message: 'Cidade inválida',
+  })
+  .optional()
+
+/**
+ * C139 — the mobile edit sheet is a SINGLE atomic write (plan decision F):
+ * the whole ficha in one schema, with the same gate/scope/name invariant as
+ * the per-field ladder; an empty email/CEP/city clears the column (null),
+ * an empty gender clears the enum.
+ */
+export const contactFullUpdateSchema = z.object({
+  id: positiveRelationshipId,
+  name: contactNameSchema,
+  email: optionalPersistedEmail,
+  phones: contactPhonesSchema.optional(),
+  gender: contactGenderFieldSchema,
+  state: z.custom<StateKey>(
+    (value) => typeof value === 'string' && value in CitiesByState,
+    'Estado inválido',
+  ),
+  city: contactCityFieldSchema,
+  postalCode: contactPostalCodeSchema,
+})
+
+export type ContactFullUpdateInput = z.input<typeof contactFullUpdateSchema>