Airtel mobile operators are most popular in india. it is very oldest network present in india. its network are very good . there services almost good in every area. it has good customer service. its internet speed is much faster then jio or other networks. due to the reliase jio its market gets down. there charges and billies are very much costly as comparetive to other service providers. so that is a main reason by which sirtel goes downwords day by day. I suggest you not use this network if you dont want to spend lot of money