For those who has a network locked SGSII, Chainfire has created an apk version of SIM unlock code finder for SGSII based on Odia's sim unlock method. http://forum.xda-developers.com/showthread.php?t=1092451
I have tried on mine and it successfully found an unlock code. Now I just need to find a sim card to see if it really works. Let us know if this works for you.
Market link (mobile): market://details?id=eu.chainfire.sgs2simunlockcodeGalaxy S2 SIM Unlock code finder will find the SIM unlock code for your device, or the unfreeze code. It'll take a few minutes to run, but you should end up with the code to SIM unlock your device. If the code doesn't work, don't keep trying it !. You may end up with a freeze. In that case, the program can also find the unfreeze code, but if the SIM unlock code is wrong in the first place, maybe so is the unfreeze code
Based on Odia's work here: http://forum.xda-developers.com/show....php?t=1064978
Also, please rate it 5 stars in Market if it works for you... I think some people who sell unlockers are purposely 1 starring it (seeing as nobody has reported any problems)
Market link (desktop): https://market.android.com/details?i...2simunlockcode