I can only assume that you have Caller Tunes (which I have) which T-Mobile offers to it's customers. To remove it, you can either send a text saying "stop" to 454545 or you can call the number from your handset and follow the options. I think calls are 10p per minute.
If you change your mind later and like the idea of Caller Tunes, all you need to do is call the number back and follow the options!
I hope this helps.
Cheryl, June 2008
