I am using airtel since 2009 and surely it gives good services but only thing I hate about airtel is its too much costly and it provides no good plans. So I only use its for receiving calls and only call at the time of emergency. It is too costly for students yes its good for business class but not for students.
Surely it has a strong network and internet is good but even 2g is too costly and 3g is extremly costly and internet pack over so fast you can't imagine 10kp per second use it or not just using whats app 10 mb vanishes like its nothing only for business purpose not good for students. Not much stars from me