I have been using Tata for 3 years till now.But since past one and half year I face the problem of echo in network.I tried using 4 handsets but the problem was not solved.It is definitely a issue with their network not the handsets.The customer care says handsets are faulty.Whatever the reason, I am discontinuing the tata service due to echo problem and poor quality of cdma handsets.Also cdma handsets heat more than GSm handsets.
This happens because the consumption of battery is more on cdma network.That explains the reason why gsm handsets offer more battery talktime than cdma. Also due to this heating I am worried about trouble to my ears.The call rate is now same for other operators as well, also they never resolved the echo problems in their network and low quality of handsets and heating problem in handsets.
So I am discontinuing being their customer.