I recently purchased a Motorola Razr i XT890 in the UK. It was locked to the UK Orange network. I tried several times to unlock this phone but was unsuccessful. I even contacted Orange but they wanted me to become a customer for at least six months before charging a hefty price for unlocking.
I came across a forum where several people had recommended cellunlocker. I gave them a try and was very happy to find they were able to help and supplied the correct unlocking code. Can't thanks you guys enough