Java Card

Hi,

Does anyone know if it's possible to implement an IMEI lock using USAT/STK and Javacard? What I want to do is write an applet that checks if a SIM has been placed in a phone whose IMEI does not match one on record, and then stops the SIM from working in the new phone if the IMEIs don't match.

Checking the IMEI is straightforward but I'm looking for suggestions of how to stop the SIM from working in the new phone, or keeping the SIM off the network so that it cannot be used. Can this be done using USAT and Javacard or does this have to be done at the card OS level?

Thanks,

C.