I have been using from 8 odd months Reliance sim service is good in city like I travel a lot in Maharashtra, I seen that the network is present in city area Nagpur , pune etc., but whenever I go rural area then there is problem of network.
Although I use this operator for calling rates its very cheap as compared to other operator. This mobile operator is not for internet uses because I found that the 2g internet is vey slow and there is no 3g service and 4g service exists.