Don't use officialiphoneunlock.co.uk. Their "guarunteed prices" are crap. My roommates mom bought a new phone and sent him her old iphone 5 from mexico. The site says it's 20 pounds to unlock it. Okay, pay the 20 pounds. get an email sayig it has to be "worldwide carrier ulocked" for some reason, and they want another 35 pounds. okay at this point we're still cheaper than buying a new iphone 5. 2 weeks later get another email, the phone is "still under contract" according to the carrier and if I still want it unlocked they want an additional 35 pounds. They issue me "trade credit" in "good faith" for the money I've paid so far. They say that since it said on the page it couldn't be under contract (it didn't the only mention of contracts at all is in their TOS which just lumps "contract issues" in with lost or stolen phones, and the description of that section reader makes no mention of contracts at all) I won't be able to get a refund from them. So now I'm out 55 pounds, and would need to pay an additional 45 to get the phone unlocked. Oh and if I issue a chargeback, which at this point is my only recourse to getting my money back, they'll just blacklist the phone from every network worldwide. This is ****ing extortion.