diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
index 220ccf3c..659612f7 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
@@ -1293,7 +1293,10 @@ private fun CallRow(ctx: Context, viewModel: ViewModel) {
                 enabled=callButtonEnabled.value
             ) {
                 Icon(
-                    imageVector = ImageVector.vectorResource(id = R.drawable.call),
+                    imageVector = if (callButtonEnabled.value)
+                        ImageVector.vectorResource(id = R.drawable.call)
+                    else
+                        ImageVector.vectorResource(id = R.drawable.call_yellow),
                     modifier = Modifier.size(48.dp),
                     tint = Color.Unspecified,
                     contentDescription = null,
@@ -1794,7 +1797,6 @@ private fun callClick(ctx: Context, viewModel: ViewModel) {
                 return
             val uriText = callUri.value.trim()
             if (uriText.isNotEmpty()) {
-                callButtonEnabled.value = false
                 val uris = Contact.contactUris(uriText)
                 if (uris.isEmpty())
                     makeCall(ctx, viewModel, uriText)
@@ -1847,6 +1849,7 @@ private fun makeCall(ctx: Context, viewModel: ViewModel, uriText: String) {
     else if (!BaresipService.requestAudioFocus(ctx))
         Toast.makeText(ctx, R.string.audio_focus_denied, Toast.LENGTH_SHORT).show()
     else {
+        callButtonEnabled.value = false
         if (Build.VERSION.SDK_INT < 31) {
             Log.d(TAG, "Setting audio mode to MODE_IN_COMMUNICATION")
             am.mode = AudioManager.MODE_IN_COMMUNICATION
diff --git a/app/src/main/res/drawable/call_yellow.xml b/app/src/main/res/drawable/call_yellow.xml
new file mode 100644
index 00000000..84c81de2
--- /dev/null
+++ b/app/src/main/res/drawable/call_yellow.xml
@@ -0,0 +1,5 @@
+<vector android:height="48dp" android:width="48dp"
+    android:viewportHeight="24" android:viewportWidth="24"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@color/colorTrafficYellow" android:pathData="M6.62,10.79c1.44,2.83 3.76,5.14 6.59,6.59l2.2,-2.2c0.27,-0.27 0.67,-0.36 1.02,-0.24 1.12,0.37 2.33,0.57 3.57,0.57 0.55,0 1,0.45 1,1V20c0,0.55 -0.45,1 -1,1 -9.39,0 -17,-7.61 -17,-17 0,-0.55 0.45,-1 1,-1h3.5c0.55,0 1,0.45 1,1 0,1.25 0.2,2.45 0.57,3.57 0.11,0.35 0.03,0.74 -0.25,1.02l-2.2,2.2z"/>
+</vector>