Reliance has very worst impression on customer with their service.I have used their sim for calling as well as net pack and I totally disappointed with this network operator.Their network signal is very weak and it as not possible to call inside room if we had to make a call then we needed to go on the roof or in street so I had very bad experience with it.Their customer care is also bad because they did not responds immediately even for long time we needed to wait.But after coming jio it is going to be very popular and most widely used network operator but with their GSM sim I really disappointed and I do not recommend this service at all.