My samsung Phone A30 is showing MM sim2 not allowed recently. It is a india Sim. 2 month before it was working good. another sim 1 is working fine. so what is the reason for that. i already tried swapping the sim . but the problem still same on 4G. so that i cant receive any calls or msg. but in 2G i can recive some messages. and some features working. Can anyone help me to solve the issue.