Default [Q] How can I SIM unlock the Xperia M?

I've had a bit of a trawl round the net and cannot find anyway to SIM unlock this phone without shelling out 20+ for an unlock code!

Has anyone succesfully SIM unlocked this phone for free, or for a bit of using Davinci etc?
Current Devices:
Samsung GT-I9300 - Galaxy S3 | Samsung GT-N9005 - Note 3 - Knox 0x1 - X-Note 10.0
Previous Devices:
Samsung N7000 | Samsung I9100 | HTC Ace | Dell Mini 5 | HTC Leo | HTC Kovsky | HTC Universal | HTC Blue Angel
My Mobile History: