Assuming you completed your contract term with the original carrier, you should go to them to unlock it. Myself, I only get unlocked devices. I had a Nokia that I wanted to unlock and tried one of the online services - it didn't work. Fortunately, I was only out about $10-20 USD for the effort. In the USA these days, I think that the carriers have to unlock the phone/modem if you have fulfilled your original contract that subsidized the device.
rubberman
Posting Virtuoso
1,562 posts since Mar 2010
Reputation Points: 277
Solved Threads: 179
Suppliers are generally unwilling to provide unlock codes
In the US they are required to by law if you are either changing providers or your contract is up. Don't know about other countries though...
rubberman
Posting Virtuoso
1,562 posts since Mar 2010
Reputation Points: 277
Solved Threads: 179