My bb curve 8520 trackpad keeps freezing??? i have had two new ones fitted and it works for a while then have to keep pulling the battery. its now gettin so bad i have to leave battery out for ages n put sim in another phone then go back to bb and try it again. its sooooo annoying. i have also installed the new software but now dont know what to do?? the repair shop say it could be my sim card? can anyon help?