diff --git a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
index 987c640a..58a38cd5 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
@@ -65,9 +65,7 @@ import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.IconCompat
 import androidx.core.net.toUri
 import androidx.lifecycle.MutableLiveData
-import androidx.media.AudioAttributesCompat
 import androidx.media.AudioFocusRequestCompat
-import androidx.media.AudioManagerCompat
 import com.tutpro.baresip.Utils.toCircle
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -804,18 +802,14 @@ class BaresipService: Service() {
                     "incoming call" -> {
                         val peerUri = ev[1]
                         val bevent = ev[2].toLong()
-                        val blockUnknown = ua.account.blockUnknown && Contact.contactName(peerUri) == peerUri
-                        val toastMsg = if (Call.inCall())
+                        val toastMsg = if (Call.isAnyCallActive(applicationContext))
                             String.format(getString(R.string.call_auto_rejected),
                                 Utils.friendlyUri(this, peerUri, ua.account))
-                        else if (blockUnknown)
+                        else if (ua.account.blockUnknown && Contact.contactName(peerUri) == peerUri)
                             String.format(getString(R.string.call_blocked),
                                 Utils.friendlyUri(this, peerUri, ua.account))
                         else if (!Utils.checkPermissions(this, arrayOf(RECORD_AUDIO)))
                             getString(R.string.no_calls)
-                        else if (!requestAudioFocus(applicationContext))
-                            // request fails if there is an active telephony call
-                            getString(R.string.audio_focus_denied)
                         else
                             ""
                         if (toastMsg != "") {
@@ -823,7 +817,7 @@ class BaresipService: Service() {
                             Api.sip_treply(callp, 486, "Busy Here")
                             Api.bevent_stop(bevent)
                             toast(toastMsg)
-                            if (blockUnknown) {
+                            if (toastMsg.contains(getString(R.string.call_blocked))) {
                                 if (ua.account.callHistory)
                                     Blocked(
                                         ua.account.aor,
@@ -2110,30 +2104,5 @@ class BaresipService: Service() {
                 Log.d(TAG, "Added service event ${event.event}")
             }
         }
-
-        fun requestAudioFocus(ctx: Context): Boolean  {
-            Log.d(TAG, "Requesting audio focus")
-            if (audioFocusRequest != null) {
-                Log.d(TAG, "Already focused")
-                return true
-            }
-            val am = ctx.getSystemService(AUDIO_SERVICE) as AudioManager
-            val attributes = AudioAttributesCompat.Builder()
-                .setUsage(AudioAttributesCompat.USAGE_VOICE_COMMUNICATION)
-                .setContentType(AudioAttributesCompat.CONTENT_TYPE_SPEECH)
-                .build()
-            audioFocusRequest = AudioFocusRequestCompat.Builder(AudioManagerCompat.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE)
-                .setAudioAttributes(attributes)
-                .setOnAudioFocusChangeListener { }
-                .build()
-            if (AudioManagerCompat.requestAudioFocus(am, audioFocusRequest!!) == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
-                Log.d(TAG, "requestAudioFocus granted")
-            } else {
-                Log.w(TAG, "requestAudioFocus denied")
-                audioFocusRequest = null
-            }
-            return audioFocusRequest != null
-        }
-
     }
 }
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Call.kt b/app/src/main/kotlin/com/tutpro/baresip/Call.kt
index de38f6d6..3dff670e 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Call.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Call.kt
@@ -1,5 +1,7 @@
 package com.tutpro.baresip
 
+import android.content.Context
+import android.media.AudioManager
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
@@ -143,5 +145,12 @@ class Call(val callp: Long, val ua: UserAgent, val peerUri: String, val dir: Str
             return BaresipService.calls.isNotEmpty()
         }
 
+        fun isAnyCallActive(ctx: Context): Boolean {
+            // Check SIP calls managed by baresip
+            if (inCall()) return true
+            // MODE_IN_CALL indicates a PSTN call is active
+            val am = ctx.getSystemService(Context.AUDIO_SERVICE) as AudioManager
+            return am.mode == AudioManager.MODE_IN_CALL
+        }
     }
 }
diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
index 8ddd8d75..cfd5717d 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
@@ -2061,7 +2061,7 @@ private fun makeCall(ctx: Context, viewModel: ViewModel, uriText: String, confer
         alertMessage.value = String.format(ctx.getString(R.string.invalid_sip_or_tel_uri), uri)
         showAlert.value = true
     }
-    else if (Call.calls().any { it.ua.account.aor != ua.account.aor })
+    else if (Call.isAnyCallActive(ctx))
         Toast.makeText(ctx, R.string.call_already_active, Toast.LENGTH_SHORT).show()
     else {
         val tm = ctx.getSystemService(Context.TELECOM_SERVICE) as android.telecom.TelecomManager