Airtel is the fast growing network in the world
Advantages
-high speed browising
-unlimited night packs with low price
-it has 4g
-3g and 4g packs are same price
-3g supports in 60% of villages in india
Disadvantages
-high price data packs
-most of villages dont have airtel network
-4g is supports in only famous cities
-some times slow internet speed