The network of airtel are available all over india even in uttrakhand which is not developed well . The internet service is to good I watch movies in youtube in 3G data. The coustemer service is also good but some bad quality are the some place you did not get 3G signals and the charges are high. but the best thingh is the speed is to good .I also use airtel and it is to good .I suggest to use airtel but its your choice what you use.