diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
index f1a9d0d2..2a9bbb8d 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
@@ -1116,7 +1116,6 @@ class ThreadActivity : SimpleActivity() {
                 val messageIds = messages.map { it.id }
                 val message = getMessages(threadId, getImageResolutions = true, limit = 1).firstOrNull { it.id !in messageIds }
                 if (message != null) {
-                    maybeUpdateMessageSubId(message)
                     insertOrUpdateMessage(message)
                 }
             }
@@ -1306,7 +1305,6 @@ class ThreadActivity : SimpleActivity() {
         }
 
         messages.filter { !it.isScheduled && !it.isReceivedMessage() && it.id > lastMaxId }.forEach { latestMessage ->
-            maybeUpdateMessageSubId(latestMessage)
             messagesDB.insertOrIgnore(latestMessage)
         }
 
@@ -1316,18 +1314,6 @@ class ThreadActivity : SimpleActivity() {
         }
     }
 
-    @SuppressLint("MissingPermission")
-    private fun maybeUpdateMessageSubId(message: Message) {
-        // subscriptionIds seem to be not filled out at sending with multiple SIM cards, so fill it manually
-        if ((subscriptionManagerCompat().activeSubscriptionInfoList?.size ?: 0) > 1) {
-            val subscriptionId = availableSIMCards.getOrNull(currentSIMCardIndex)?.subscriptionId
-            if (subscriptionId != null) {
-                updateMessageSubscriptionId(message.id, subscriptionId)
-                message.subscriptionId = subscriptionId
-            }
-        }
-    }
-
     private fun isMmsMessage(text: String): Boolean {
         val isGroupMms = participants.size > 1 && config.sendGroupMessageMMS
         val isLongMmsMessage = isLongMmsMessage(text) && config.sendLongMessageMMS
diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
index 28190c1f..6458fd41 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
@@ -112,7 +112,7 @@ fun Context.getMessages(
         val thread = cursor.getLongValue(Sms.THREAD_ID)
         val subscriptionId = cursor.getIntValue(Sms.SUBSCRIPTION_ID)
         val status = cursor.getIntValue(Sms.STATUS)
-        val participants = senderNumber.split(getAddressSeparator().toRegex()).map { number ->
+        val participants = senderNumber.split(getAddressSeparator()).map { number ->
             val phoneNumber = PhoneNumber(number, 0, "", number)
             val participantPhoto = getNameAndPhotoFromPhoneNumber(number)
             SimpleContact(0, 0, participantPhoto.name, photoUri, arrayListOf(phoneNumber), ArrayList(), ArrayList())
@@ -676,16 +676,6 @@ fun Context.updateMessageStatus(id: Long, status: Int) {
     contentResolver.update(uri, contentValues, selection, selectionArgs)
 }
 
-fun Context.updateMessageSubscriptionId(messageId: Long, subscriptionId: Int) {
-    val uri = Sms.CONTENT_URI
-    val contentValues = ContentValues().apply {
-        put(Sms.SUBSCRIPTION_ID, subscriptionId)
-    }
-    val selection = "${Sms._ID} = ?"
-    val selectionArgs = arrayOf(messageId.toString())
-    contentResolver.update(uri, contentValues, selection, selectionArgs)
-}
-
 fun Context.updateUnreadCountBadge(conversations: List<Conversation>) {
     val unreadCount = conversations.count { !it.read }
     if (unreadCount == 0) {