I am using uninor since 2 years the call rates are very low but the net work is very bad and GPRS connectivity in the night time is good( after 12 AM) rest of very poor connectivity. since I have recommend the uninor the people who needs to make calls not for GPRS. also they should use as secondary line. The net work only available town area not rural.
The GPRS speed was initially were good but nowadays very very slow.