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Unlocking this version
The main problem with this version is the rooting does not work with all the known procedures. Sometimes it works( few reports) but almost always it does not.
So , I will consider the second case where the rooting does not work. In the below picture all the available root files are tested without any success.
1. The solution is to flash S5839IBULC1_VD2LB2.zip (it can be found on the Z3x support) WITHOUT the boot files. (thanks to Colin for this hint)
2. Root the phone with the usual root.zip which is available on the net, google, rapidshare, etc
The application superuser will request to update the bins, just ignore it
3. Unlock your phone using Z3x or any other tool. Make direct unlock because the read codes feature will not work.
While starting, the phone shows Vodafone screen, which is absurd for a handset having Orange logo on the back cover.
4. So reflash with the latest Orange France Firmware d'Orange France
It is my local carrier
Ps: To get Download mode (Odin mode) VOL Up + VOL Down + Power On, then VOL Up
Copied and translate from French