diff --git a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
index c7531c88..ee6ba869 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
@@ -588,6 +588,8 @@ class BaresipService: Service() {
                         CallHistoryNew.clearRecordings()
                         CallHistoryNew.save()
                         Message.save()
+                        Blocked.save()
+                        BlockRule.save()
                         if (recordings.exists())
                             recordings.deleteRecursively()
                         restored.delete()
@@ -595,28 +597,21 @@ class BaresipService: Service() {
 
                     File(filesDir, "recordings").mkdir()
                     File(filesDir, "tmp").mkdir()
-                }.start()
 
-                hotSpotAddresses = Utils.hotSpotAddresses()
-                linkAddresses = linkAddresses()
-                var addresses = ""
-                for (la in linkAddresses)
-                    addresses = "$addresses;${la.key};${la.value}"
-                Log.i(TAG, "Link addresses: $addresses")
-                activeNetwork = cm.activeNetwork
-                Log.i(TAG, "Active network: $activeNetwork")
+                    hotSpotAddresses = Utils.hotSpotAddresses()
+                    linkAddresses = linkAddresses()
+                    var addresses = ""
+                    for (la in linkAddresses)
+                        addresses = "$addresses;${la.key};${la.value}"
+                    Log.i(TAG, "Link addresses: $addresses")
 
-                registerPhoneAccount()
+                    val userAgent = Config.variable("user_agent")
+                    val software = if (userAgent != "")
+                        userAgent
+                    else
+                        "baresip v${BuildConfig.VERSION_NAME} " +
+                                "(Android ${VERSION.RELEASE}/${System.getProperty("os.arch") ?: "?"})"
 
-                Log.i(TAG, "AEC/AGC/NS available = $aecAvailable/$agcAvailable/$nsAvailable")
-
-                val userAgent = Config.variable("user_agent")
-                val software = if (userAgent != "")
-                    userAgent
-                else
-                    "baresip v${BuildConfig.VERSION_NAME} " +
-                            "(Android ${VERSION.RELEASE}/${System.getProperty("os.arch") ?: "?"})"
-                Thread {
                     baresipStart(
                         filesPath,
                         addresses.removePrefix(";"),
@@ -627,6 +622,15 @@ class BaresipService: Service() {
 
                 isServiceRunning = true
 
+                activeNetwork = cm.activeNetwork
+                Log.i(TAG, "Active network: $activeNetwork")
+
+                registerPhoneAccount()
+
+                Log.i(TAG, "AEC/AGC/NS available = $aecAvailable/$agcAvailable/$nsAvailable")
+
+                isServiceRunning = true
+
                 if (linkAddresses.isEmpty())
                     toast(getString(R.string.no_network), Toast.LENGTH_LONG)
 
@@ -1796,11 +1800,15 @@ class BaresipService: Service() {
     @Keep
     fun started() {
         Log.d(TAG, "Received 'started' from baresip")
-        isNativeReady = true
 
         Handler(Looper.getMainLooper()).post {
+            isNativeReady = true
             addMobileUserAgent()
             Account.saveAccounts()
+            CallHistoryNew.save()
+            Message.save()
+            Blocked.save()
+            BlockRule.save()
             if (VERSION.SDK_INT >= 29)
                 updateMobileStatus()
 
@@ -2400,15 +2408,13 @@ class BaresipService: Service() {
 
         mobileUa.let { ua ->
             val isAirplaneModeOn = Utils.isAirplaneModeOn(this)
-            val status = newStatus ?: if (ua.status == circleGreen.getValue(colorblind))
-                ua.status
-            else if (isAirplaneModeOn)
+            val status = newStatus ?: if (isAirplaneModeOn)
                 R.drawable.circle_white
-            else if (ua.status == R.drawable.circle_white)
-                // Show "Red" (not yet in service)
-                circleRed.getValue(colorblind)
+            else if (previousMobileServiceState == ServiceState.STATE_IN_SERVICE)
+                circleGreen.getValue(colorblind)
             else
-                ua.status
+                circleRed.getValue(colorblind)
+
             if (ua.status != status) {
                 Log.d(TAG, "Updating Mobile status to $status")
                 ua.updateStatus(status)
@@ -3222,6 +3228,8 @@ class BaresipService: Service() {
         var addressFamily = ""
         var dnsServers = listOf<InetAddress>()
 
+        val messagesLock = Any()
+
         // <aor, password> of those accounts that have auth username without auth password
         val aorPasswords = mutableMapOf<String, String>()
         var aecAvailable = false
diff --git a/app/src/main/kotlin/com/tutpro/baresip/BlockRule.kt b/app/src/main/kotlin/com/tutpro/baresip/BlockRule.kt
index dce3f0ee..5e285660 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BlockRule.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BlockRule.kt
@@ -26,6 +26,7 @@ class BlockRule(val aor: String = "", val pattern: String) {
         }
 
         fun save() {
+            if (!BaresipService.isNativeReady) return
             Log.d(TAG, "Saving ${BaresipService.blockRules.size} block rules")
             val file = File(BaresipService.filesPath + "/blocking")
             try {
@@ -46,7 +47,11 @@ class BlockRule(val aor: String = "", val pattern: String) {
             if (file.exists())
                 try {
                     val jsonString = file.readText()
-                    BaresipService.blockRules = Json.decodeFromString<MutableList<BlockRule>>(jsonString)
+                    val blockRules = Json.decodeFromString<List<BlockRule>>(jsonString)
+                    synchronized(BaresipService.blockRules) {
+                        BaresipService.blockRules.clear()
+                        BaresipService.blockRules.addAll(blockRules)
+                    }
                     Log.d(TAG, "Restored ${BaresipService.blockRules.size} block rules")
                 } catch (e: Exception) {
                     Log.e(TAG, "Deserialization exception: $e")
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Blocked.kt b/app/src/main/kotlin/com/tutpro/baresip/Blocked.kt
index f0197f51..cf2f5743 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Blocked.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Blocked.kt
@@ -33,6 +33,7 @@ class Blocked (
         }
 
         fun save() {
+            if (!BaresipService.isNativeReady) return
             Log.d(TAG, "Saving ${BaresipService.blocked.size} blocked calls and messages")
             val file = File(BaresipService.filesPath + "/blocked")
             try {
@@ -54,7 +55,10 @@ class Blocked (
                 try {
                     val jsonString = file.readText()
                     val blockedList = Json.decodeFromString<List<Blocked>>(jsonString)
-                    BaresipService.blocked = ArrayList(blockedList)
+                    synchronized(BaresipService.blocked) {
+                        BaresipService.blocked.clear()
+                        BaresipService.blocked.addAll(blockedList)
+                    }
                     Log.d(TAG, "Restored ${BaresipService.blocked.size} blocked calls and messages")
                 } catch (e: Exception) {
                     Log.e(TAG, "Deserialization exception: $e")
diff --git a/app/src/main/kotlin/com/tutpro/baresip/CallHistory.kt b/app/src/main/kotlin/com/tutpro/baresip/CallHistory.kt
index 899e785a..33914f24 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/CallHistory.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/CallHistory.kt
@@ -76,6 +76,7 @@ class CallHistoryNew(val aor: String, val peerUri: String, val direction: String
         }
 
         fun save() {
+            if (!BaresipService.isNativeReady) return
             val historyCopy = synchronized(BaresipService.callHistory) {
                 ArrayList(BaresipService.callHistory)
             }
@@ -105,7 +106,10 @@ class CallHistoryNew(val aor: String, val peerUri: String, val direction: String
                 if (content.startsWith("[")) {
                     try {
                         val restoredHistory = Json.decodeFromString<List<CallHistoryNew>>(content)
-                        BaresipService.callHistory = ArrayList(restoredHistory)
+                        synchronized(BaresipService.callHistory) {
+                            BaresipService.callHistory.clear()
+                            BaresipService.callHistory.addAll(restoredHistory)
+                        }
                         Log.d(TAG, "Restored history of ${BaresipService.callHistory.size} calls from JSON")
                         return
                     } catch (e: Exception) {
@@ -118,7 +122,10 @@ class CallHistoryNew(val aor: String, val peerUri: String, val direction: String
                     @Suppress("UNCHECKED_CAST")
                     val restoredHistory = ois.readObject() as? List<CallHistoryNew>
                     if (restoredHistory != null) {
-                        BaresipService.callHistory = ArrayList(restoredHistory)
+                        synchronized(BaresipService.callHistory) {
+                            BaresipService.callHistory.clear()
+                            BaresipService.callHistory.addAll(restoredHistory)
+                        }
                         Log.d(TAG, "Restored history of ${BaresipService.callHistory.size} calls from Java")
                         save()
                     }
diff --git a/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
index 6f484562..98814fb9 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/CallsScreen.kt
@@ -341,7 +341,7 @@ private fun Calls(
                                     secondAction.value = {
                                         if (ua.account.isMobile && ua.status != circleGreen.getValue(colorblind)) {
                                             alertTitle.value = ctx.getString(R.string.notice)
-                                            alertMessage.value = ctx.getString(R.string.airplane_mode)
+                                            alertMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
                                             showAlert.value = true
                                         }
                                         else {
@@ -357,8 +357,7 @@ private fun Calls(
                                         if (ua.account.isMobile) {
                                             if (ua.status != circleGreen.getValue(colorblind)) {
                                                 alertTitle.value = ctx.getString(R.string.notice)
-                                                alertMessage.value =
-                                                    ctx.getString(R.string.airplane_mode)
+                                                alertMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
                                                 showAlert.value = true
                                             }
                                             else if (!Utils.isDefaultSmsApp(ctx)) {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/ChatScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/ChatScreen.kt
index 0cff5a36..7b9b7a2f 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/ChatScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/ChatScreen.kt
@@ -488,7 +488,6 @@ private fun NewMessage(
     val showDialog = remember { mutableStateOf(false) }
     val dialogMessage = remember { mutableStateOf("") }
 
-    val airplaneMode = stringResource(R.string.airplane_mode)
     val messageFailed = stringResource(R.string.message_failed)
     val noTelephonyProvider = stringResource(R.string.no_telephony_provider)
 
@@ -570,7 +569,7 @@ private fun NewMessage(
                     addMessage(msg)
                     if (ua.account.isMobile) {
                         if (ua.status != circleGreen.getValue(colorblind)) {
-                            dialogMessage.value = airplaneMode
+                            dialogMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
                             showDialog.value = true
                         }
                         else {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/ContactScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/ContactScreen.kt
index 93ab06b9..1fa9c38c 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/ContactScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/ContactScreen.kt
@@ -732,7 +732,7 @@ private fun UrisSection(
                             onClick = {
                                 if (ua.account.isMobile && ua.status != circleGreen.getValue(colorblind)) {
                                     alertTitle.value = ctx.getString(R.string.notice)
-                                    alertMessage.value = ctx.getString(R.string.airplane_mode)
+                                    alertMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
                                     showAlert.value = true
                                 }
                                 else if (ua.account.isMobile && !Utils.isDefaultSmsApp(ctx)) {
@@ -770,7 +770,7 @@ private fun UrisSection(
                             onClick = {
                                 if (ua.account.isMobile && ua.status != circleGreen.getValue(colorblind)) {
                                     alertTitle.value = ctx.getString(R.string.notice)
-                                    alertMessage.value = ctx.getString(R.string.airplane_mode)
+                                    alertMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
                                     showAlert.value = true
                                 }
                                 else {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
index 7134e4fd..233ff2da 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
@@ -2119,7 +2119,7 @@ private fun makeCall(ctx: Context, viewModel: ViewModel, uriText: String,
     }
     else if (ua.account.isMobile && ua.status != circleGreen.getValue(colorblind)) {
         alertTitle.value = ctx.getString(R.string.notice)
-        alertMessage.value = ctx.getString(R.string.airplane_mode)
+        alertMessage.value = Utils.mobileStatusMessage(ctx, ua.status)
         showAlert.value = true
         return
     }
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Message.kt b/app/src/main/kotlin/com/tutpro/baresip/Message.kt
index bacbca6b..60356690 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Message.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Message.kt
@@ -10,7 +10,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
               var new: Boolean): java.io.Serializable {
 
     fun add() {
-        val updatedMessages = synchronized(BaresipService.messages) {
+        val updatedMessages = synchronized(BaresipService.messagesLock) {
             BaresipService.messages.toMutableList()
         }
         updatedMessages.add(this)
@@ -26,18 +26,18 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
             }
         if (remove != null)
             updatedMessages.remove(remove)
-        synchronized(BaresipService.messages) {
+        synchronized(BaresipService.messagesLock) {
             BaresipService.messages = updatedMessages.toList()
         }
         save()
     }
 
     fun delete() {
-        val updatedMessages = synchronized(BaresipService.messages) {
+        val updatedMessages = synchronized(BaresipService.messagesLock) {
             BaresipService.messages.toMutableList()
         }
         updatedMessages.remove(this)
-        synchronized(BaresipService.messages) {
+        synchronized(BaresipService.messagesLock) {
             BaresipService.messages = updatedMessages.toList()
         }
         save()
@@ -55,25 +55,25 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun clearMessagesOfAor(aor: String) {
-            val updatedMessages = synchronized(BaresipService.messages) {
+            val updatedMessages = synchronized(BaresipService.messagesLock) {
                 BaresipService.messages.toMutableList()
             }
             val it = updatedMessages.iterator()
             while (it.hasNext()) if (it.next().aor == aor) it.remove()
-            synchronized(BaresipService.messages) {
+            synchronized(BaresipService.messagesLock) {
                 BaresipService.messages = updatedMessages.toList()
             }
             save()
         }
 
         fun deleteAorMessage(aor: String, time: Long) {
-            val updatedMessages = synchronized(BaresipService.messages) {
+            val updatedMessages = synchronized(BaresipService.messagesLock) {
                 BaresipService.messages.toMutableList()
             }
             for (message in updatedMessages.reversed())
                 if (message.aor == aor && message.timeStamp == time) {
                     updatedMessages.remove(message)
-                    synchronized(BaresipService.messages) {
+                    synchronized(BaresipService.messagesLock) {
                         BaresipService.messages = updatedMessages.toList()
                     }
                     save()
@@ -82,13 +82,13 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun updateAorMessage(aor: String, time: Long) {
-            val updatedMessages = synchronized(BaresipService.messages) {
+            val updatedMessages = synchronized(BaresipService.messagesLock) {
                 BaresipService.messages.toMutableList()
             }
             for (message in updatedMessages.reversed())
                 if (message.aor == aor && message.timeStamp == time) {
                     message.new = false
-                    synchronized(BaresipService.messages) {
+                    synchronized(BaresipService.messagesLock) {
                         BaresipService.messages = updatedMessages.toList()
                     }
                     save()
@@ -97,7 +97,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun unreadMessages(aor: String): Boolean {
-            synchronized(BaresipService.messages) {
+            synchronized(BaresipService.messagesLock) {
                 for (message in BaresipService.messages.reversed())
                     if (message.aor == aor && message.new)
                         return true
@@ -106,7 +106,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun unreadMessagesFromPeer(aor: String, peerUri: String): Boolean {
-            synchronized(BaresipService.messages) {
+            synchronized(BaresipService.messagesLock) {
                 for (message in BaresipService.messages.reversed())
                     if (message.aor == aor && message.peerUri == peerUri && message.new)
                         return true
@@ -115,7 +115,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun updateMessagesFromPearRead(aor: String, peerUri: String): Boolean {
-            val updatedMessages = synchronized(BaresipService.messages) {
+            val updatedMessages = synchronized(BaresipService.messagesLock) {
                 BaresipService.messages.toMutableList()
             }
             var updated = false
@@ -125,7 +125,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
                     updated = true
                 }
             if (updated) {
-                synchronized(BaresipService.messages) {
+                synchronized(BaresipService.messagesLock) {
                     BaresipService.messages = updatedMessages.toList()
                 }
                 save()
@@ -134,7 +134,8 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
         }
 
         fun save() {
-            val messagesCopy = synchronized(BaresipService.messages) {
+            if (!BaresipService.isNativeReady) return
+            val messagesCopy = synchronized(BaresipService.messagesLock) {
                 BaresipService.messages.toList()
             }
             val file = File(BaresipService.filesPath, "messages")
@@ -143,7 +144,7 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
                 file.writeText(jsonString)
                 Log.d(TAG, "Saved ${messagesCopy.size} messages in JSON")
             } catch (e: Exception) {
-                Log.e(TAG, "Serialization exception", e)
+                Log.e(TAG, "Serialization exception: $e")
                 try {
                     val fos = FileOutputStream(file)
                     val oos = ObjectOutputStream(fos)
@@ -164,7 +165,9 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
                 if (content.startsWith("[")) {
                     try {
                         val restoredMessages = Json.decodeFromString<List<Message>>(content)
-                        BaresipService.messages = restoredMessages
+                        synchronized(BaresipService.messagesLock) {
+                            BaresipService.messages = restoredMessages
+                        }
                         Log.d(TAG, "Restored ${BaresipService.messages.size} messages from JSON")
                         return
                     } catch (e: Exception) {
@@ -177,7 +180,9 @@ class Message(val aor: String, val peerUri: String, val message: String, val tim
                     @Suppress("UNCHECKED_CAST")
                     val restoredMessages = ois.readObject() as? List<Message>
                     if (restoredMessages != null) {
-                        BaresipService.messages = restoredMessages
+                        synchronized(BaresipService.messagesLock) {
+                            BaresipService.messages = restoredMessages
+                        }
                         Log.d(TAG, "Restored ${BaresipService.messages.size} messages from Java")
                         save()
                     }
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
index 733d70d6..77c0fee7 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
@@ -903,6 +903,13 @@ object Utils {
         ) != 0
     }
 
+    fun mobileStatusMessage(ctx: Context, status: Int): String {
+        return if (status == R.drawable.circle_white)
+            ctx.getString(R.string.airplane_mode)
+        else
+            ctx.getString(R.string.mobile_service_not_available)
+    }
+
     @Suppress("unused")
     fun isPSTNCallActive(ctx: Context): Boolean {
         val tm = ctx.getSystemService(Context.TELECOM_SERVICE) as? TelecomManager ?: return false
diff --git a/app/src/main/res/values-fi/strings.xml b/app/src/main/res/values-fi/strings.xml
index b134ee6f..31202374 100644
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@@ -642,6 +642,7 @@
     <string name="no_notifications">Et voi käyttää tätä sovellusta ilman Ilmoitukset-lupaa.</string>
     <string name="airplane_mode">Laite on lentotilassa. Poista lentotila, jos haluat käyttää
         mobiilitiliä.</string>
+    <string name="mobile_service_not_available">Mobiilipalvelu ei ole käytettävissä.</string>
     <string name="no_calls">Et voi soittaa puheluita tai vastata niihin ilman Mikrofoni-lupaa.</string>
     <string name="no_video_calls">Salli Kamera-lupa jotta voit soittaa videopuheluita ja vastata niihin.</string>
     <string name="no_backup">Et voi tallentaa sovelluksen tietoja ilman Tallennustila-lupaa.</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 4c843d95..1f68785b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -627,6 +627,7 @@
     <string name="no_notifications">You are not able to use this application without \"Notifications\"
         permission.</string>
     <string name="airplane_mode">Airplane mode is ON. Turn it OFF to use mobile account.</string>
+    <string name="mobile_service_not_available">Mobile service is not available.</string>
     <string name="no_calls">baresip needs \"Microphone\" permission for voice calls.</string>
     <string name="no_video_calls">Grant \"Camera\" permission to make or answer video calls.</string>
     <string name="no_backup">You are not able create backup without \"Storage\" permission.</string>