diff --git a/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
index 6b5921d9..3a747334 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
@@ -293,6 +293,17 @@ private fun Calls(
         onLastClicked = lastAction.value,
     )
 
+    val alertTitle = remember { mutableStateOf("") }
+    val alertMessage = remember { mutableStateOf("") }
+    val showAlert = remember { mutableStateOf(false) }
+
+    AlertDialog(
+        showDialog = showAlert,
+        title = alertTitle.value,
+        message = alertMessage.value,
+        lastButtonText = stringResource(R.string.ok),
+    )
+
     val lazyListState = rememberLazyListState()
     LazyColumn(
         modifier = Modifier
@@ -338,10 +349,16 @@ private fun Calls(
                                 }
                                 lastButtonText.value = ctx.getString(R.string.send_message)
                                 lastAction.value = {
-                                    if (ua != null) {
-                                        handleIntent(ctx, viewModel, intent, "message")
-                                        navController.navigateUp()
+                                    if (account.isMobile) {
+                                        alertTitle.value  = ctx.getString(R.string.notice)
+                                        alertMessage.value = ctx.getString(R.string.no_sms_messaging)
+                                        showAlert.value = true
                                     }
+                                    else
+                                        if (ua != null) {
+                                            handleIntent(ctx, viewModel, intent, "message")
+                                            navController.navigateUp()
+                                        }
                                 }
                                 showDialog.value = true
                             },
diff --git a/app/src/main/kotlin/com/tutpro/baresip/ContactsScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/ContactsScreen.kt
index c808e4a9..18f5ee3e 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/ContactsScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/ContactsScreen.kt
@@ -407,6 +407,17 @@ private fun ContactsContent(
             onLastClicked = lastAction.value,
         )
 
+    val alertTitle = remember { mutableStateOf("") }
+    val alertMessage = remember { mutableStateOf("") }
+    val showAlert = remember { mutableStateOf(false) }
+
+    AlertDialog(
+        showDialog = showAlert,
+        title = alertTitle.value,
+        message = alertMessage.value,
+        lastButtonText = stringResource(R.string.ok),
+    )
+
     val lazyListState = rememberLazyListState()
 
     LaunchedEffect(searchQuery) {
@@ -518,8 +529,15 @@ private fun ContactsContent(
                                         lastText.value = ctx.getString(R.string.send_message)
                                         lastAction.value = {
                                             if (ua != null) {
-                                                handleIntent(ctx, viewModel, intent, "message")
-                                                navController.navigateUp()
+                                                if (ua.account.isMobile) {
+                                                    alertTitle.value  = ctx.getString(R.string.notice)
+                                                    alertMessage.value = ctx.getString(R.string.no_sms_messaging)
+                                                    showAlert.value = true
+                                                }
+                                                else {
+                                                    handleIntent(ctx, viewModel, intent, "message")
+                                                    navController.navigateUp()
+                                                }
                                             }
                                         }
                                         showDialog.value = true
diff --git a/app/src/main/res/values-fi/strings.xml b/app/src/main/res/values-fi/strings.xml
index 1ee1536c..71502032 100644
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@@ -294,6 +294,7 @@
         %2$s puheluhistoriasta\?
     </string>
     <string name="calls_delete_question">Haluatko poistaa \'%1$s\' %2$s puheluhistoriasta\?</string>
+    <string name="no_sms_messaging">SMS-tekstiviestitystä ei ole vielä toteutettu.</string>
     <string name="disable_history">Poista käytöstä</string>
     <string name="enable_history">Ota käyttöön</string>
     <string name="delete_history_alert">Haluatko tyhjentää tilin \'%1$s\' puheluhistorian\?</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index b8201dfb..b82fde90 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -280,6 +280,7 @@
     <string name="calls_add_delete_question">Do you want to add \'%1$s\' to contacts or delete
         %2$s from call history\?</string>
     <string name="calls_delete_question">Do you want to delete \'%1$s\' %2$s from call history\?</string>
+    <string name="no_sms_messaging">Sorry, no SMS messaging yet.</string>
     <string name="disable_history">Disable</string>
     <string name="enable_history">Enable</string>
     <string name="delete_history_alert">Do you want to delete call history of account \'%1$s\'\?</string>