It may take several attempts to connect to the available networks. Search for networks and pick a wireless service provider.Select Network Operators from the drop-down menu.Go to Device information or Phone information.īecause you are not getting reception, you may be getting the Connection Problem or Invalid MMI Code error.NOTE: There is no need to push the send button the Service mode will appear automatically. It also functions similarly to a comma.Ĥ.Turn on the radio to enable IMS over SMS. After your prefix code, you can also put ‘+’ (plus). With this addition, the operation is forced to look for the problem. Only a comma (,) must be added to the end of the prefix code (*135#). Restart your phone and uninstall any newly downloaded apps.Īnother option for resolving your connection issue is pretty straightforward. If it works, there is an app on your Android phone that is causing the Invalid MMI Code problem. Within the dialer, enter the same Prefix code you tried earlier to test whether it works, e.g. Now it’s time to put everything to the test. A safe mode emblem will appear in the bottom left corner of the screen.Keep hitting the menu button, which is to the left of the home key, while holding down the power button.To enter safe mode, however, follow these steps: Please follow the instructions below to enter safe mode and see whether there is a suspect app interfering with your phone’s network operation. Safe mode will turn off any pre-installed apps or services on the phone. You can see if the invalid MMI code problem persists without any other programs running in the background by disabling them. Safe mode allows you to debug your phone more effectively because it only runs stock Android programs. Entering *#06# on a GSM phone, for example, displays the model and serial number (see IMEI). MMI codes are input in the same way that phone numbers are to get a range of information and to enable and disable certain functions. Different Fixes for Connection Problem or Invalid MMI CodeĪ mobile code that starts with a star/hash (*#) prefix is known as an MMI code. What is MMI Code?Ī mobile code that starts with a star/hash (*#) prefix is known as an MMI (Man Machine Interface code) code. This usually happens when a user tries to send an MMI code (Man-Machine-Interface code).įortunately, there are a few options for resolving the Android “Connection problem or invalid MMI code” issue. ![]() 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. ![]()
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