I am not sure what it is called on iOS but on Android it's called "Access point names". In that there are bunch of access points basically for data, mms. For Ai

I am not sure what it is called on iOS but on Android it's called "Access point names". In that there are bunch of access points basically for data, mms. For Airtel you have to go into settings of "airtelgprs.com" APN and change bearer from IPv4 to IPv6 or IPv4/IPv6. In most cases it should happen automatically.