[LG V10 General] mikeyinid:
I don't know anything about LG devices. But I notice if we can get the system image we can inject root. Maybe? Here is the by-name partition layout for the T-Mobile US variant;

C:\Users\Michael>adb shell
shell@pplus:/ $ cat /proc/partitions
cat /proc/partitions
major minor #blocks name

179 0 61071360 mmcblk0
179 1 88064 mmcblk0p1
179 2 2048 mmcblk0p2
179 3 512 mmcblk0p3
179 4 1024 mmcblk0p4
179 5 1024 mmcblk0p5
179 6 512 mmcblk0p6
179 7 512 mmcblk0p7
179 8 512 mmcblk0p8
179 9 2048 mmcblk0p9
179 10 1024 mmcblk0p10
179 11 512 mmcblk0p11
179 12 512 mmcblk0p12
179 13 1024 mmcblk0p13
179 14 512 mmcblk0p14
179 15 2048 mmcblk0p15
179 16 512 mmcblk0p16
179 17 512 mmcblk0p17
179 18 512 mmcblk0p18
179 19 512 mmcblk0p19
179 20 512 mmcblk0p20
179 21 2048 mmcblk0p21
179 22 512 mmcblk0p22
179 23 1024 mmcblk0p23
179 24 6656 mmcblk0p24
179 25 16384 mmcblk0p25
179 26 32768 mmcblk0p26
179 27 1536 mmcblk0p27
179 28 1536 mmcblk0p28
179 29 1536 mmcblk0p29
179 30 512 mmcblk0p30
179 31 512 mmcblk0p31
259 0 512 mmcblk0p32
259 1 2048 mmcblk0p33
259 2 512 mmcblk0p34
259 3 512 mmcblk0p35
259 4 512 mmcblk0p36
259 5 512 mmcblk0p37
259 6 6144 mmcblk0p38
259 7 49152 mmcblk0p39
259 8 40960 mmcblk0p40
259 9 40960 mmcblk0p41
259 10 10240 mmcblk0p42
259 11 6144 mmcblk0p43
259 12 32768 mmcblk0p44
259 13 4096 mmcblk0p45
259 14 4096 mmcblk0p46
259 15 47104 mmcblk0p47
259 16 2048 mmcblk0p48
259 17 10240 mmcblk0p49
259 18 14336 mmcblk0p50
259 19 4386816 mmcblk0p51
259 20 1261568 mmcblk0p52
259 21 54971392 mmcblk0p53
259 22 1007 mmcblk0p54
179 32 4096 mmcblk0rpmb
253 0 945600 zram0
shell@pplus:/ $ ls /dev/block/platform/
ls /dev/block/platform/
f9824900.sdhci
shell@pplus:/ $ ls -l /dev/block/platform/f9824900.sdhci/by-name
ls -l /dev/block/platform/f9824900.sdhci/by-name
lrwxrwxrwx root root 2014-12-31 17:52 DDR -> /dev/block/mmcblk0p33
lrwxrwxrwx root root 2014-12-31 17:52 aboot -> /dev/block/mmcblk0p9
lrwxrwxrwx root root 2014-12-31 17:52 abootbak -> /dev/block/mmcblk0p15
lrwxrwxrwx root root 2014-12-31 17:52 apdp -> /dev/block/mmcblk0p18
lrwxrwxrwx root root 2014-12-31 17:52 boot -> /dev/block/mmcblk0p40
lrwxrwxrwx root root 2014-12-31 17:52 cache -> /dev/block/mmcblk0p52
lrwxrwxrwx root root 2014-12-31 17:52 devinfo -> /dev/block/mmcblk0p23
lrwxrwxrwx root root 2014-12-31 17:52 dpo -> /dev/block/mmcblk0p20
lrwxrwxrwx root root 2014-12-31 17:52 drm -> /dev/block/mmcblk0p42
lrwxrwxrwx root root 2014-12-31 17:52 eksst -> /dev/block/mmcblk0p36
lrwxrwxrwx root root 2014-12-31 17:52 encrypt -> /dev/block/mmcblk0p35
lrwxrwxrwx root root 2014-12-31 17:52 factory -> /dev/block/mmcblk0p47
lrwxrwxrwx root root 2014-12-31 17:52 fau -> /dev/block/mmcblk0p50
lrwxrwxrwx root root 2014-12-31 17:52 fota -> /dev/block/mmcblk0p49
lrwxrwxrwx root root 2014-12-31 17:52 fsc -> /dev/block/mmcblk0p30
lrwxrwxrwx root root 2014-12-31 17:52 fsg -> /dev/block/mmcblk0p29
lrwxrwxrwx root root 2014-12-31 17:52 grow -> /dev/block/mmcblk0p54
lrwxrwxrwx root root 2014-12-31 17:52 hyp -> /dev/block/mmcblk0p7
lrwxrwxrwx root root 2014-12-31 17:52 hypbak -> /dev/block/mmcblk0p12
lrwxrwxrwx root root 2014-12-31 17:52 keystore -> /dev/block/mmcblk0p32
lrwxrwxrwx root root 2014-12-31 17:52 laf -> /dev/block/mmcblk0p39
lrwxrwxrwx root root 2014-12-31 17:52 limits -> /dev/block/mmcblk0p17
lrwxrwxrwx root root 2014-12-31 17:52 misc -> /dev/block/mmcblk0p25
lrwxrwxrwx root root 2014-12-31 17:52 modem -> /dev/block/mmcblk0p1
lrwxrwxrwx root root 2014-12-31 17:52 modemst1 -> /dev/block/mmcblk0p27
lrwxrwxrwx root root 2014-12-31 17:52 modemst2 -> /dev/block/mmcblk0p28
lrwxrwxrwx root root 2014-12-31 17:52 mpt -> /dev/block/mmcblk0p44
lrwxrwxrwx root root 2014-12-31 17:52 msadp -> /dev/block/mmcblk0p19
lrwxrwxrwx root root 2014-12-31 17:52 persist -> /dev/block/mmcblk0p26
lrwxrwxrwx root root 2014-12-31 17:52 persistent -> /dev/block/mmcblk0p22
lrwxrwxrwx root root 2014-12-31 17:52 pmic -> /dev/block/mmcblk0p3
lrwxrwxrwx root root 2014-12-31 17:52 pmicbak -> /dev/block/mmcblk0p11
lrwxrwxrwx root root 2014-12-31 17:52 raw_resources -> /dev/block/mmcblk0p45
lrwxrwxrwx root root 2014-12-31 17:52 raw_resourcesbak -> /dev/block/mmcblk0p46
lrwxrwxrwx root root 2014-12-31 17:52 rct -> /dev/block/mmcblk0p37
lrwxrwxrwx root root 2014-12-31 17:52 recovery -> /dev/block/mmcblk0p41
lrwxrwxrwx root root 2014-12-31 17:52 rpm -> /dev/block/mmcblk0p8
lrwxrwxrwx root root 2014-12-31 17:52 rpmbak -> /dev/block/mmcblk0p14
lrwxrwxrwx root root 2014-12-31 17:52 sbl1 -> /dev/block/mmcblk0p4
lrwxrwxrwx root root 2014-12-31 17:52 sbl1bak -> /dev/block/mmcblk0p10
lrwxrwxrwx root root 2014-12-31 17:52 sdi -> /dev/block/mmcblk0p6
lrwxrwxrwx root root 2014-12-31 17:52 sdibak -> /dev/block/mmcblk0p16
lrwxrwxrwx root root 2014-12-31 17:52 sec -> /dev/block/mmcblk0p34
lrwxrwxrwx root root 2014-12-31 17:52 sns -> /dev/block/mmcblk0p43
lrwxrwxrwx root root 2014-12-31 17:52 spare1 -> /dev/block/mmcblk0p2
lrwxrwxrwx root root 2014-12-31 17:52 spare2 -> /dev/block/mmcblk0p21
lrwxrwxrwx root root 2014-12-31 17:52 spare3 -> /dev/block/mmcblk0p24
lrwxrwxrwx root root 2014-12-31 17:52 spare4 -> /dev/block/mmcblk0p38
lrwxrwxrwx root root 2014-12-31 17:52 spare5 -> /dev/block/mmcblk0p48
lrwxrwxrwx root root 2014-12-31 17:52 ssd -> /dev/block/mmcblk0p31
lrwxrwxrwx root root 2014-12-31 17:52 system -> /dev/block/mmcblk0p51
lrwxrwxrwx root root 2014-12-31 17:52 tz -> /dev/block/mmcblk0p5
lrwxrwxrwx root root 2014-12-31 17:52 tzbak -> /dev/block/mmcblk0p13
lrwxrwxrwx root root 2014-12-31 17:52 userdata -> /dev/block/mmcblk0p53