Originally Posted by cheezels81

with my original sim inside i sent both lock and unlock messages and they both locked and unlocked the phone.

then i set my phone guardian to Both, put in my mom's sim and started up my e61, a few seconds later it was locked. i sent the unlock message (:u:...) and it unlocked.

for me i think i'll keep "lock on sim change" off and just lock it remotely or not at all and surprise the thief one day =).