guys guys, need help. i rooted my phone few months back and realized that everytime i keep getting mssed call sms. looks like no one can ever call me but i can call out. read few threads in earlier post says that they have that problem too. i've read few solutions but didnt seem to understand at all.

i tried factory reset and all methods to remove the SuperSU but seems like no improvement. someone says that i need to restore the firmware or smth? anyone teaches or does this? really appreciate your help guys...

someone please help me with above queries, loads of thanks!