If this problem occurs in your m30s device so this problem occurs in
other then jio operator because jio network work on lte or only 4g
network but sim like idea airtle vodafone works on both 4g/3g/2g network
and sometime it shows sim1 not register i...
do factory reset of your phone after making backup of your phone you
need to first switch off your mobile then push all three buttons volume
or power buttons for 5 to 10 sec then there is an option of factory
reset tap on it and push power buttons th...