How to unlock carrier of iphone 4?

Hi guys,

I have just got a iphone 4 on three and was wondering is there any way you could unlock the carrier? Is it locked to three in the first place? I want to use a tmob sim in it. I dont mind jailbreaking it. Any help will be much appreciated



Go to settings, general, about and then post what version and modem firmware it's running.

Original Poster

version : 4.2.1
MF : 03.10.01

Any good?

no good,just sit n wait for dev team new software .
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