First of all the data charges are high, even they being one of the leading Telecom companies. And then as they say they are ’setting up a tower every hour’ their network is still poor in remote areas and the sub-cities like in lower part of Assam. And when it shows full network even then the internet speed is slower than other SIM cards, talking about their 4G& 3G service. Call connectivity is good though. Still I suggest to go with a SIM card of international brand. The local Indian companies are disrupting due to maybe high consumer demand.