trust me dont try and do it manually (entering 'secret' codes, without using any extra hardware), it could cause a lot more trouble than its worth. just go down the high street and pay someone to do it, or buy the required cables and software and follow instructions on how to do it. you can get these sets from eBay, but there really is no point, it costs the same to get someone else to do it, and you'll only be using the unlocking stuff once (unless you wanna start charging other ppl to unlock their v3s... hmmm....) hope this helps
cool, but the safer option would be to have it done in front of you (high street, some shop etc) coz you can never tell if its a scam or not, but it probably isnt. also, my way takes like 2 mins MAX, whilst waiting for a postal service takes a couple