1st I see their advertisement in television.They show us different type of offers but the tower is pathetic.when I travell in train there is only 2g tower and in some place there is no tower. But when you see in advertisement they show airtel 4g is every where.but forget about 4g still there is no stable 3g in urban areas.They give offers but same offers at different price for different customers.There 3g speed is very poor. It takes too much time to open a page. If you do whatsapp and facebook then ok but for net browsing it is not enough.