That is a "DoS" style vulnerability with the Nokia 6210.
I would also like to point out at this point that Nokia models from 3310 and pre are acceptable to a buffer overflow attack. Which can crash the phone. But unfortunatly when i told Nokia of this problem i got greated with a response to the effect of "Do not continue your research into our products and services. Any further research will result in the following legal procedures etc etc:..." Or something to that effect.
Sooo unfortunatly I can not publish my code. BUT! .. I can talk all i want.. haha. And i am sure with the way guys are attacking the wireless market more and more. I am sure someone is going to come across the same problem I did and publish it.
Good Luck Nokia! MWUAH! :X :X :X