As I use tata docomo GSM network, this network is very bad, before I use tata docomo CDMA that network is better then GSM network.i change that network because I am facing problem in searching a CDMA phone there are no option in CDMA phone, that’s why I choose GSM network. I could not use net surfing due to bad network. if anybody call me, IVR say the not reachable.
I was suffer by that problem. then I call to their call center and the said to me problem in your handset and then I purchase I new hand set and I got same problem, after that I port my sim, but I found Tata docomo networks are very week and not stable.