Has anybody been having Cellular connection issues on their iPhone 6s after updating to iOS 15? I have been having major issues with my 4G connection in India. I use a local Carrier by the name of Airtel. My dad and my mother both have the same carrier but they have iPhone 7 plus and and iPhone XS and they are not facing any issues. My phone loses it's 4G connection all of a sudden after disconnecting from wi-fi and suddenly goes into no service. after recovering from that, it goes into EDGE mode and suddenly GPRS. I had recently gotten my Lighting connector changed and had the Antenna lines checked which showed no issues. Any Solutions for this? Is anyone else facing the same issue on their 6s?