Hi friends I have used many operator like vodafone, Airtel, Bsnl, idea, telinor, docomo, aircel jio and many mores. Finally I am using vodafone beacause it has satisfied me in all format .I am using this operators from about 5years and I had no problem in it till . It has given me the best serive with best network from town to village area .In villages areas also network is there and its call rate is also low as per tariff and there is romaning free in India means no incoming charges. There are always exciting offers are there for call rate .As I use Internet it speed is good in 3g . Its doesnot deduct balance from balance . customer care service is helpful also better then other they response on problem try to give better service.My no.9647202562( vodafone) . I have used other sim also which also are good in network like airtel, idea, docomo, aircel this are give good services in network and customer services .But like airtel is very strong in network in India you can buy it for network but call rate is little higher then vodafone .After vodafone I have choice airtel due to strong network . Idea also is in average , aircel , docomo and jio.But l want to say please dont use bsnl beacause it has given the worst service not network bad customers service . Friend’s this is my point of view what I experienced I will say that you must ask your friends or retailer for you better conformation.