Call forwarding Connection problem or invalid MMI code. Typing the code to cancel call forwarding#21#& dial also returns the "invalid MMI code" error. I attached a logcat as well as a modem log. Edit:It's the same issue after upgrading to LineageOS 18.1 so added a new logcat & update...
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,...
Insert a comma at the end of the prefix code:In some cases, adding a comma at the end of the prefix code can help you fix the invalid MMI code error on your Android. For instance, if you are trying to dial the*#0589#code, add a comma at the end by long-pressing the asterisk (...
There are several reasons why the “Connection problem or invalid MMI code” error message appears on your phone. The main reason is an issue with the carrier provider or problems with the SIM authentication on the smartphone. The error is quite common for phones with dual-SIM capabilities, bu...
This is the usual process for most Android devices with stock Android ROM and user interface. You know your phone is already connected to your mobile network when you are getting signal bars that shows 4G, LTE, 3G, etc. You can try dialling the MMI code again. ...
check your SIM card and turn on IMS over SMS are just a few. If you still have a network connection or invalid MMI code error on your Android phone after trying the procedures many times, you might need to visit a local shop and have your phone checked properly by an authorized technici...
As you can see, there are several ways on how you can fix the MMI code error. If you still have a network connection or invalid MMI code error on your Android phone after trying the procedures many times, you might need to visit a local shop and have your phone checked properly by an...
Updated July 30, 2024Reviewed & Updated byAfam Onyimadu Quick Tips File corruption is a likely cause of the problem, and using Microsoft’s File and Folder troubleshooter should fix this. Also, the built-in SFC and DISM could fix corruption in the downloaded file and remove the problem. ...