I am using airtel 4g service in my smartphone but I am very disappointed with their network service.
As I live in new ashok nagar, delhi and here some times CALL CONNECTIVITY ISSUE AND MY INTERNET IS NOT WORKING INSIDE MY ROOM.I complaint about this issue many times and one person came here to resolve my issue but after coming that person and his troubleshooting I am still facing network issue on that particular area.
but outside that area airtel 4g is working good.