[ZTE Z7, Z7 Max, Z7 Mini] ymaystru:
cat /proc/mounts after ota update from 15 to 19

rootfs / rootfs ro,relatime 0 0

tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,size=448620k,nr_inodes=112155,mode=755 0 0

devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0

none /dev/cpuctl cgroup rw,relatime,cpu 0 0

adb /dev/usb-ffs/adb functionfs rw,relatime 0 0

proc /proc proc rw,relatime 0 0

sysfs /sys sysfs rw,seclabel,relatime 0 0

selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0

debugfs /sys/kernel/debug debugfs rw,relatime 0 0

none /sys/fs/cgroup tmpfs rw,seclabel,relatime,size=448620k,nr_inodes=112155,mode=750,gid=1000 0 0

none /acct cgroup rw,relatime,cpuacct 0 0

tmpfs /mnt/asec tmpfs rw,seclabel,relatime,size=448620k,nr_inodes=112155,mode=755,gid=1000 0 0

/dev/block/dm-0 /mnt/asec/com.jrummy.busybox.installer-1 ext4 ro,dirsync,seclabel,nosuid,nodev,noatime 0 0

/dev/block/dm-1 /mnt/asec/com.cmer.terminal-2 ext4 ro,dirsync,seclabel,nosuid,nodev,noatime 0 0

/dev/block/dm-2 /mnt/asec/com.sonelli.juicessh-2 ext4 ro,dirsync,seclabel,nosuid,nodev,noatime 0 0

tmpfs /mnt/obb tmpfs rw,seclabel,relatime,size=448620k,nr_inodes=112155,mode=755,gid=1000 0 0

/dev/block/bootdevice/by-name/system /system ext4 ro,seclabel,relatime,discard,data=ordered 0 0

/dev/block/bootdevice/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,relatime,discard,noauto_da_alloc,resuid=1000,resgid=9990,data=ordered 0 0

/dev/block/bootdevice/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0

/dev/block/bootdevice/by-name/persist /persist ext4 rw,seclabel,nosuid,nodev,relatime,data=ordered 0 0

/dev/block/bootdevice/by-name/modem /firmware vfat ro,context=u:object_r:firmware_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0

/dev/fuse /mnt/shell/emulated fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

/dev/fuse /storage/uicc0 fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

/dev/fuse /storage/sdcard1 fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

/dev/fuse /storage/emulated/legacy fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

tmpfs /storage/emulated tmpfs rw,seclabel,nosuid,nodev,relatime,size=448620k,nr_inodes=112155,mode=751,gid=1028 0 0

/dev/block/vold/179:129 /mnt/media_rw/sdcard1 vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0

/dev/block/vold/179:129 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0

/dev/fuse /storage/emulated/0 fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

/dev/fuse /storage/emulated/legacy fuse rw,nosuid,nodev,noexec,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

---------- Post added at 11:50 PM ---------- Previous post was at 11:40 PM ----------

opensource(dot)ztedevice(dot)com

There u can find zte z812 kernel source code.

Pls somebody build that firmware update for getting device rooted.

PS my unlocked by AT&T, but still cannot get root.