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Vbux is rewarded for helping !

I just bought an IPhone 4 from America, when I came back to my country i bought a Mini-Sim and inserted it, it said SIM Failure , I Wanna use my country's SIM not AT&T, People told me I have to jailbreak then use ultrasn0w to unlock.. i wanna know if it's safe, since i don't want to jailbreak and is it possible of unjailbreaking after unlocking it? or will it damage my phone?

Nope it won't because I did it to mine and it was fine

I'm pretty sure you do not need to jailbreak it; just go to somewhere in your town/city and there is usually a place which unlocks phones for about £20.

it won't what? be more precise please

---------- Post added at 02:52 PM ---------- Previous post was at 02:50 PM ----------

and what does that " Unlock " consist of? Can't i do it here?

You probably could, and I THINK that all they do; is use a similar way to jailbreaking, but does not actually jailbreak the device.

MOVED to iPhone/iPod Discussion

and do you know how i could do it?

it isn't possible man
if you restore the device from jailbreak, you won't able to use your personal sim again....

if i were you i would jailbreak it just to use the unlock feature if you jailbreak it i don't think you will damage your phone you should give it a try it's easy

Unlocking it would be perfectly safe just watch out for the base bands that's where it gets messy.