This was intended for higher powered devices, but seems to work well on outdated devices too. If you have trouble, please kindly post so that I can fix it. Works perfect on my Samsung Galaxy S2.
Also, the unlocking method was chosen to keep the app free. Give it a shot, I basically pick an app to install, install it, open it, exit, then uninstall it. Return to settings and give it a second to update. The unlock is permanent.
As for the unlocking, I would like to hear feedback on the method. Does it suck? Is it better than paying? Thanks!