It disconnects the internet connection in the middle, and auto-reconnects for a few seconds. It is done so silently that even you could not understand that disconnection happens. Bad for you if you are doing some online transaction. (MTS MBlaze v 1.0.27)
But funny thing is when I use BSNL dialer, this problem does not happen!! :-O
Another irritating part is whenever you connect, a new webpage (Yahoo-MTS cobranded homepage) will open! It also happens with new v23 Huawei Mobile Partner (I reverted back to Nirav's v21 or v22 custom version, I can't remember right now).