From what i know this modem can not be unlocked right now. (I tried with z3x and octopus)
see my post here
http://forum.gsmhosting.com/vbb/f684...oblem-1712345/
the only way i managed to unlock is to flash an older firmware (XXEMC2 for example) and then do unlock.
the problem is that by doing this the efs will be demage (because the new version of the efs since MG2/MG4) and you will got 004 imei, so after the unlock you need to repair imei.
But.. if you do that, after each firmware update you will need to do 'repair network', otherwise you will have the 'not registering in network' problem.