I have used triband since the day it was launched in Mumbai. The speed was amazing and I had no problems till recently. Suddenly my router died! It took me 10 days to get it replaced (free). There is no customer service departemnt which functions at MTNL. I used to get directed from one number to another and the last thing I heard was the best...I did not show up as a triband user on their system! Funniest part was that I had to explain that I would not shout at them if I was not using thier product! Even then it took them 3 days to realize the problem. Meanwhile I used the reliance data card on my laptop and learnt that though the service was super duper the speed was very slow compared to MTNL. So my experience is that MTNL is good as long as it goes on smoothly but god forbid you have a problem...then it is extremely difficult to get it sorted out. One tip tell them that you want to surrender it..it works like magic! They seem to be mortally terrified about the word "surrender". They have still that monopolistic attitude and care a damn about the customer unless you raise the decibel levels or threaten.