Airtel is india’s fastest 4g network operator.It, s speed is awesome, sofast you can’t believe.It is the one of the largest mobile network operator in the world.No problem of slow speed, fast downloading service.airtel gives good offer in low cost .it gives so many offer.it, s 2g& 3g offer is also good.so you don, t make habbit of free free data.
You should definetly used airtel sim.