I used airtel 4G in my android mobile it’s really very fast its speed to really too good. We can watch youtube videos without any interrupt. downloading is very fast within moments we can download an aap from play store. But the bad thing is it is very expensive.
Recharge of 4g is costly but it gives very fast internet service. I used this service when airtel gave 1BG internet in Rs. 1(That was a scheme for a 4g sim user once only. You can claim your 1GB free from my airtel app and enjoy fastest 4g service.