Prefix code (MMI) A simple and effective way to fix a connection problem or invalid MMI code on an Huawei phone is to add a comma at the end of the Prefix code. For example: If your Prefix code is*2904*7#then adding the comma at the end would do just the trick, which will look...
A notification stating “Connection trouble or invalid MMI code” appears on occasion, which might be annoying for Android users. When the invalid MMI code notification occurs, it usually implies that you won’t be able to make calls or send texts until the problem is fixed. This usually happ...
Every now and then, you may run into theConnection Problem or Invalid MMI Codepop up error on your Android device. This generally happens when a user is trying to send an Man-Machine-Interface code, aka MMI code.What is a MMI codeyou ask? It’s those funny codes you enter on your d...
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See also - We have a collection of the full MMI and USSD Code lists for both iPhone and Android (Samsung Included) Solution 11: Update Your Software Update the software version on your Android. Navigate to: Settings Scroll down to the extreme bottom Select Software Update Please wait for it...
a few times you face quite frustrating issues which don’t go smoothly. One such issue which we all face now and then is “Unfortunately the process com.android.phone has stopped.” The issue is similar toGoogle Play Services has stopped,Connection problem or invalid MMI code, andMobile...
MMI or Man Machine Interface codes are useful when you want to access information about your Android phone or enable or disable certain features. But why is your phone showing the "Connection Problem or Invalid MMI Code" error? This could happen due to a network glitch, SIM card malfunction,...