Fix Connection & Invalid MMI Code Errors on Your Samsung Galaxy 📱

This video shows that how to fix connection problem or invalid mmi code on android phone.these type of errors are occuring due to the sim card management .<br>How to Fix Connection problem or invalid MMI code error occurs in any mobile phone having any Network Providers (SIM). Are you getting the message .<br>For instant recharge, i am dialing *120*16 digit pin number from the recharge coupon or voucher#. At this time ussd code starts running and displays .<br>How to fix Running USSD code error Connection problem or invalid MMI code in Any phone model like Samsung Galaxy Note 4, Sony xperia, Moto g, .