diff --git a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkNativeCallLauncher.kt b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkNativeCallLauncher.kt
index d73d0eb..b01e839 100644
--- a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkNativeCallLauncher.kt
+++ b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkNativeCallLauncher.kt
@@ -5,6 +5,10 @@ import android.content.Context
 import android.content.Intent
 import android.util.Log
 import android.widget.Toast
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
 import ru.f7cloud.talk.activities.CallActivity
 import ru.f7cloud.talk.services.CallForegroundService
 import ru.f7cloud.talk.utils.bundle.BundleKeys
@@ -22,6 +26,9 @@ object TalkNativeCallLauncher {
     private const val TAG = "TalkNativeCallLauncher"
     private const val WEBVIEW_CALL_ACTIVITY = "ru.forbion.f7cloud.feature.talk.TalkCallActivity"
 
+    // Main-scope для запуска звонка после suspend-подготовки vendor-юзера (IO)
+    private val launchScope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
+
     fun launchIncomingCall(
         context: Context,
         session: AuthSession,
@@ -83,26 +90,30 @@ object TalkNativeCallLauncher {
             }
             return
         }
-        if (!TalkVendorBootstrap.ensureSessionReady(context, session)) {
-            showError(context, "Не удалось подготовить Talk для звонка")
-            return
-        }
         val token = callContext.roomToken.trim()
         if (token.isBlank()) {
             showError(context, "Некорректная комната звонка")
             return
         }
-        runCatching {
-            startCallActivity(
-                context,
-                buildCallIntent(context, session, callContext, incomingFromNotification, suppressIncomingRingtone),
-            )
-        }.onFailure { error ->
-            Log.e(TAG, "Native CallActivity launch failed", error)
-            if (TalkNativeConfig.allowWebViewCallFallback) {
-                launchWebViewFallback(context, session, token, incomingFromNotification)
-            } else {
-                showError(context, "Не удалось начать звонок")
+        // Подготовка vendor-юзера — suspend (IO): раньше runBlocking держал main
+        // на пути звонка (ANR-риск на входящем звонке, аудит C4). Запуск activity — на main.
+        launchScope.launch {
+            if (!TalkVendorBootstrap.ensureSessionReady(context, session)) {
+                showError(context, "Не удалось подготовить Talk для звонка")
+                return@launch
+            }
+            runCatching {
+                startCallActivity(
+                    context,
+                    buildCallIntent(context, session, callContext, incomingFromNotification, suppressIncomingRingtone),
+                )
+            }.onFailure { error ->
+                Log.e(TAG, "Native CallActivity launch failed", error)
+                if (TalkNativeConfig.allowWebViewCallFallback) {
+                    launchWebViewFallback(context, session, token, incomingFromNotification)
+                } else {
+                    showError(context, "Не удалось начать звонок")
+                }
             }
         }
     }
diff --git a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorBootstrap.kt b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorBootstrap.kt
index 66dd921..30c6bcb 100644
--- a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorBootstrap.kt
+++ b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorBootstrap.kt
@@ -2,6 +2,10 @@ package ru.forbion.f7cloud.feature.talknative
 
 import android.content.Context
 import android.util.Log
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
 import ru.forbion.f7cloud.core.auth.AuthSession
 import ru.forbion.f7cloud.core.auth.AuthStore
 
@@ -10,15 +14,20 @@ import ru.forbion.f7cloud.core.auth.AuthStore
  */
 object TalkVendorBootstrap {
     private const val TAG = "TalkVendorBootstrap"
+    private val warmupScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
 
+    /** Прогрев vendor-юзера на старте — в фоне (раньше блокировал main в Application.onCreate). */
     fun onApplicationCreate(context: Context) {
         if (!TalkNativeConfig.bootstrapVendorRuntime) return
-        val session = AuthStore(context).load() ?: return
-        runCatching { TalkVendorUserSync.ensureUser(context, session) }
-            .onFailure { Log.w(TAG, "Talk user sync failed: ${it.message}") }
+        val appContext = context.applicationContext
+        warmupScope.launch {
+            val session = AuthStore(appContext).load() ?: return@launch
+            runCatching { TalkVendorUserSync.ensureUser(appContext, session) }
+                .onFailure { Log.w(TAG, "Talk user sync failed: ${it.message}") }
+        }
     }
 
-    fun ensureSessionReady(context: Context, session: AuthSession): Boolean {
+    suspend fun ensureSessionReady(context: Context, session: AuthSession): Boolean {
         if (!TalkNativeConfig.bootstrapVendorRuntime) return true
         return runCatching { TalkVendorUserSync.ensureUser(context, session) }
             .onFailure { Log.w(TAG, "Talk user sync failed: ${it.message}") }
diff --git a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorUserSync.kt b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorUserSync.kt
index a80ae61..d7ee4c7 100644
--- a/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorUserSync.kt
+++ b/feature/talk-native/src/main/java/ru/forbion/f7cloud/feature/talknative/TalkVendorUserSync.kt
@@ -5,22 +5,25 @@ import android.util.Log
 import ru.f7cloud.talk.application.F7cloudTalkApplication
 import ru.f7cloud.talk.f7cloud.F7TalkUserSync
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
 import ru.forbion.f7cloud.core.auth.AuthSession
 
 /**
  * Ensures talk-android [ru.f7cloud.talk.data.user.model.User] exists for F7cloud sessions.
  * Required before native [ru.f7cloud.talk.activities.CallActivity] can run.
+ *
+ * suspend (IO) — раньше был runBlocking на main (старт приложения и путь звонка),
+ * что давало ANR-риск из аудита (C4/п.7).
  */
 object TalkVendorUserSync {
     private const val TAG = "TalkVendorUserSync"
 
-    fun ensureUser(context: Context, session: AuthSession): Boolean {
+    suspend fun ensureUser(context: Context, session: AuthSession): Boolean {
         if (context.applicationContext !is F7cloudTalkApplication) {
             Log.w(TAG, "Application is not F7cloudTalkApplication, skip sync")
             return false
         }
-        return runBlocking(Dispatchers.IO) {
+        return withContext(Dispatchers.IO) {
             runCatching {
                 F7TalkUserSync.get().ensureUser(
                     serverUrl = session.serverUrl,