Don’t worry. You are not alone, and fixing this is easier than you think.
Have you ever tried to make a call, only to hear a robotic voice say, “Call Barring is On” or see the dreaded “Connection problem or invalid MMI code” error? call barring turn off
This is a legacy feature that only allows calls to a preset list of numbers. If you try to call anyone else, your phone says "Call barred." Don’t worry