Hello friends, I want to say that I have been using Airtel’s SIM for a year and the biggest problem of this SIM network is when I start net it’s network is disappear every time, so never bought the Airtel SIM. But who speed in voice calling is better but when run the net in it, the network that are there are reduce and when it comes to the speed of calling it is good but when the net run the network are lost Finally, I want to say that Airtel’s SIM will break on your digital life.