Default [Q] need to unlock i9505 4.3

i bought i9505 from france and now it locked sim.
it have version 4.3 rooted
i tried this guide:
http://forum.xda-developers.com/show....php?t=2282683
nothin happend.
i noticed this guide
http://forum.xda-developers.com/show....php?t=2192025
it will help me? how can i know what version i need?
and how can i backup my phone if it needed to be restore?
thank you!
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i downgrade the modem to XXUAME2 and now i succeed to do this guide :

http://forum.xda-developers.com/show....php?t=2282683

but the phone still lock!!
plz help me.