7 Fixes for Connection Problem or Invalid MMI Code
MMI (Man-Machine-Interface) codes are special characters such as Star (*) or Pound (#) Fixes include toggling Airplane Mode, restarting the phone, and adding a comma to the code Phones with dual SIM cards or an eSIM can often fix the issue by turning off one SIM Older fixes that switch the phone to a 2G/3G… Read More: 7 Fixes for Connection Problem or Invalid MMI Code »