I have problem how to Unlock AT&T iPhone 4 to use on other sim card. I use many services from net and Im be scam from them many time, and I now not like to do for my iPhone 4 locked on AT&T Network from USA.

I find this service now here: http://www.myunlockservice.com/unlock-iphone-att But Im not a sure that this is trusted. Please if some here any time is used this Unlock AT&T iPhone service to replay me some experiences this will help me much.

Im from UK and like to use on carrier network in UK here, but the AT&T company is make me much problems and not like to unlock me, any Help will be good for me to Unlock my iPhone locked on AT&T.

Thanks