I also had the similarexpereince with my TATA INDICOM Connection. The had installed caller tunes in my system without my concent, andaftergoing to their regional office here at Chennai, and literally threten withm with dire consequences, if they didnt cancel the feature my my number, they did it. even they challenge me to go for legal action. Even though they had cancelled the function from my cell, im sure they have charged me for activation. Since a pre paid connection, i've no options to find out how much or what r all these guys deducting from my account.