I can't turn on cellular data for postpaid sim card
I was trying to start mobile cellular data. It's been a year I can't turn it on. Usually, I am currently using Postpaid sim card. When I was using Prepaid sim card than, I could turn mobile cellular data. I was reading the article. They said to change APN protocol. I have reset APN. But, I can't find anyway to configure existing APN protocol for Airtel sim card. But, I can't create a new one. They had said to
Opt For a Factory Reset. I had reset my mobile 5-6 months ago. In the article, they had said to Reset Your Phone’s Network Connection by the "code"
##72786# then, I am getting
connection problem or invalid MMI code. My sim card is 3G. I don't think that "I didn't make it 4G that's why I am getting the problem" (cause, my prepaid sim card was 3G either). I don't have any data limit also. I have rebooted my mobile thousand times. My mobile isn't in safe mode also. Sim card isn't expired also.