IMEI *** I want my iPhone to support all SIM cards
<Personal Information Edited by Host>
What makes you think that it doesn't? If the phone is locked, then you need to contact the carrier the device is locked to and see if they provide unlocking services. If they do, find out if you qualify. Only the carrier the device is locked to can authorize the unlock.
Posting your IMEI on an international public forum is a very bad idea. I've asked the hosts to edit.
OK. Is there some reason this can not be accomplished?
IMEI *** I want my iPhone to support all SIM cards