According to a post over on Mobility Digest, At&t will provide an unlock code for their flagship Windows
Phone, the Samsung Focus. Previously, it was very difficult, if not impossible, to get an unlock code for the device, but it seems that it is now possible with a little pleasantry and patience.
Other users are reporting success with acquiring an unlock code from At&t as well, so why not give them a call if you’d like your Focus unlocked and remember to ask nicely.
Windows Phone Metro 