if you accidentally upgraded to 1.1.3:

1.1.3 is currently:

NOT unlockable by software
NOT unlockable by ****SIM (turbosim or any sim solution is not working..)
NOT jailbreakable

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PEACE NOT WAR FOR 2008!
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also if you are iphone user, check this forum:
http://www.qatarliving.com/node/44597#comment-250429