T-mobile has free copy of Instant Messanger on its website. this IM connects to ICQ, AOL and Yahoo. I only use yahoo IM. but way it works is that it gets every chat message as SMS and saves it to SIM card. so after 30-40 chat messages, you will start getting message "SIM card is full !! Please delete some SMS messages" this keeps coming every 30 secs. I have set my Options-->SMS-->Keep message on SIM card to NO and Previous Items to ZERO but still this will not go away.
HELP PLEASE !!!