I m using airtel network since last 4 year.i preferred airtel because I m travelling so much.and airtel network connection is very good in each area even in small village.in my native place, there is huge problem of network and call dropping.
But airtel gives very much coverage.its internet charges are also good.speed is also good.customer service is also userfriendly.
They give missed call alert freely.which is very much advantageous.they provide me calling 30p/ minute for 30 days at 18 rs.that plans saves my huge balance.overall good coverage , good speed , charges sometime looks higher but its ok.customer support is good.if u travelling so much and more concerned with network coverage go to airtel.