[Sony Xperia Z Ultra] dkanas:
Yes, i know. But I don't know if the partitions in this prototype match the production models partitions, there could be a difference, like in the gpe model. I don't want to brick this device, it's worth a half of the usual monthly salary in my country :( Does someone know what exactly is the difference between the regular and the gpe editions?

Update: I think I pulled out the partition layout from my prototype:

lrwxrwxrwx root root 1970-01-02 04:33 DDR -> /dev/block/mmcblk0p17
lrwxrwxrwx root root 1970-01-02 04:33 FOTAKernel -> /dev/block/mmcblk0p16
lrwxrwxrwx root root 1970-01-02 04:33 LTALabel -> /dev/block/mmcblk0p18
lrwxrwxrwx root root 1970-01-02 04:33 TA -> /dev/block/mmcblk0p1
lrwxrwxrwx root root 1970-01-02 04:33 aboot -> /dev/block/mmcblk0p5
lrwxrwxrwx root root 1970-01-02 04:33 alt_aboot -> /dev/block/mmcblk0p11
lrwxrwxrwx root root 1970-01-02 04:33 alt_dbi -> /dev/block/mmcblk0p10
lrwxrwxrwx root root 1970-01-02 04:33 alt_rpm -> /dev/block/mmcblk0p12
lrwxrwxrwx root root 1970-01-02 04:33 alt_s1sbl -> /dev/block/mmcblk0p9
lrwxrwxrwx root root 1970-01-02 04:33 alt_sbl1 -> /dev/block/mmcblk0p8
lrwxrwxrwx root root 1970-01-02 04:33 alt_tz -> /dev/block/mmcblk0p13
lrwxrwxrwx root root 1970-01-02 04:33 apps_log -> /dev/block/mmcblk0p22
lrwxrwxrwx root root 1970-01-02 04:33 boot -> /dev/block/mmcblk0p14
lrwxrwxrwx root root 1970-01-02 04:33 cache -> /dev/block/mmcblk0p24
lrwxrwxrwx root root 1970-01-02 04:33 dbi -> /dev/block/mmcblk0p4
lrwxrwxrwx root root 1970-01-02 04:33 fsg -> /dev/block/mmcblk0p21
lrwxrwxrwx root root 1970-01-02 04:33 modemst1 -> /dev/block/mmcblk0p19
lrwxrwxrwx root root 1970-01-02 04:33 modemst2 -> /dev/block/mmcblk0p20
lrwxrwxrwx root root 1970-01-02 04:33 ramdump -> /dev/block/mmcblk0p15
lrwxrwxrwx root root 1970-01-02 04:33 rpm -> /dev/block/mmcblk0p6
lrwxrwxrwx root root 1970-01-02 04:33 s1sbl -> /dev/block/mmcblk0p3
lrwxrwxrwx root root 1970-01-02 04:33 sbl1 -> /dev/block/mmcblk0p2
lrwxrwxrwx root root 1970-01-02 04:33 system -> /dev/block/mmcblk0p23
lrwxrwxrwx root root 1970-01-02 04:33 tz -> /dev/block/mmcblk0p7
lrwxrwxrwx root root 1970-01-02 04:33 userdata -> /dev/block/mmcblk0p25
lrwxrwxrwx root root 1970-01-02 04:33 DDR -> /dev/block/mmcblk0p17
lrwxrwxrwx root root 1970-01-02 04:33 FOTAKernel -> /dev/block/mmcblk0p16
lrwxrwxrwx root root 1970-01-02 04:33 LTALabel -> /dev/block/mmcblk0p18
lrwxrwxrwx root root 1970-01-02 04:33 TA -> /dev/block/mmcblk0p1
lrwxrwxrwx root root 1970-01-02 04:33 aboot -> /dev/block/mmcblk0p5
lrwxrwxrwx root root 1970-01-02 04:33 alt_aboot -> /dev/block/mmcblk0p11
lrwxrwxrwx root root 1970-01-02 04:33 alt_dbi -> /dev/block/mmcblk0p10
lrwxrwxrwx root root 1970-01-02 04:33 alt_rpm -> /dev/block/mmcblk0p12
lrwxrwxrwx root root 1970-01-02 04:33 alt_s1sbl -> /dev/block/mmcblk0p9
lrwxrwxrwx root root 1970-01-02 04:33 alt_sbl1 -> /dev/block/mmcblk0p8
lrwxrwxrwx root root 1970-01-02 04:33 alt_tz -> /dev/block/mmcblk0p13
lrwxrwxrwx root root 1970-01-02 04:33 apps_log -> /dev/block/mmcblk0p22
lrwxrwxrwx root root 1970-01-02 04:33 boot -> /dev/block/mmcblk0p14
lrwxrwxrwx root root 1970-01-02 04:33 cache -> /dev/block/mmcblk0p24
lrwxrwxrwx root root 1970-01-02 04:33 dbi -> /dev/block/mmcblk0p4
lrwxrwxrwx root root 1970-01-02 04:33 fsg -> /dev/block/mmcblk0p21
lrwxrwxrwx root root 1970-01-02 04:33 modemst1 -> /dev/block/mmcblk0p19
lrwxrwxrwx root root 1970-01-02 04:33 modemst2 -> /dev/block/mmcblk0p20
lrwxrwxrwx root root 1970-01-02 04:33 ramdump -> /dev/block/mmcblk0p15
lrwxrwxrwx root root 1970-01-02 04:33 rpm -> /dev/block/mmcblk0p6
lrwxrwxrwx root root 1970-01-02 04:33 s1sbl -> /dev/block/mmcblk0p3
lrwxrwxrwx root root 1970-01-02 04:33 sbl1 -> /dev/block/mmcblk0p2
lrwxrwxrwx root root 1970-01-02 04:33 system -> /dev/block/mmcblk0p23
lrwxrwxrwx root root 1970-01-02 04:33 tz -> /dev/block/mmcblk0p7
lrwxrwxrwx root root 1970-01-02 04:33 userdata -> /dev/block/mmcblk0p25

What further information can I provide you? :)