I just upgraded to the Nexus 5 and will be selling my Galaxy S II X (T989D from Koodo). I paid $35 for the unlock and he gave me the Master Subsidy Unlock Code. I'm not sure exactly what this is but it sounds like it should work on all Koodo T989D devices.
Master Subsidy Unlock Code:
I hope this helps other SIM unlock their devices.
A non-Koodo SIM must be inserted into the SIM card slot. Boot the device and it should ask for an unlock code. Enter the above code and tap "Unlock".