If you change your cid to super cid then the phone will be able to be used with any carrier. This is not the same as network unlock, the lock will reactivate if you change your cid back.
To SIM unlock permanently you need to follow this method:
Just yesterday, we talked about the highly anticipated launch of the first batch … more
16 Sep 2014
By Will Verduzco
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?