This is one of the worst products in the industry. I had a Tata Photon 2G which was good - so, I got this new one last year bcoz of the trust. But the performance is worse - it often disconnects too.
The worst part is when I recharged for 1200/- and took it to Chennai to work from there, for few days - I found that it did not work at all in Chennai. Worst product ever!