I am using air tel service from 2010 I found it very good . best service, no network problem . whenever I go in villages I get network there also. But internet on airtel is very costly compare to Vodafone’s, reliance, aircel, idea. Out of all these airtel is very very costl . it is difficult for a student to use airtel in his college life I am talking about average student. 4g service of airtel not available everywhere even 3g service not available everywhere in India at this time also but overall airtel is good because network available even in remote areas. But if airtel will give some exciting offer on internet it will be better than all. Now airtel open network is available in many parts of country. Friends you can go for airtel if you need network all the time if you visited untouched places I mean if you go for hiking, you are nature lover . when I go to such places airtel not disappoint me that’s the reason I am using airtel. Moreover I convert my prepaid into postpaid .