Go to a specalist phone shop but i tried it before and it didn't work and it was £20 but i did get a refund. They said it was because it was a new phone and a complicated phone (my LG viewty). Don't go to a 3 shop because they won't do it due to legal things and they want you to stay with them. If you wanna do it yourself here's a great website - http://mobilementalism.com/how-to-unlock-a-mobile-phone/