MEP code?

[Skins]

well, I hope you understand me, some time ago I bought a blackberry 8520 Curve ...
the problem is I need a data rate if I want to download programs, etc.. (eg Tapatalk)
I'm trying to unlock my phone to go to another company that has a cheaper data rate, and thus put on my mobile any operator
anyone can help me with the MEP code?
someone explained to me as it gets (which program I can use, etc) to get in an easy and free

Thank you.

[Le_bonc]

maybe this could work
(you need an account to see links)