It never gets disconnected while on heavy raining or cloudy climates.
Service is quite good but at some places it needs to improve its downloading speed.if suppose you got a 4 mbps plan but while downloading you will only get 900kbps to 1 mbps and on unlimited downloading plans you will only get 60 kbps.
But it Has 9pm to 7am unlimited calling across all over india which is a big advantage for heavy callers.