[General Questions and Answers] m2m4m5:
these instructions will let you root your GOME U7

but they will also delete ALL personal DATA on it,

so make a backup of them to an external place (sd-card, internet)

before you start to root your phone if they are important to you

(remove then the sd-card with your personal stuff from the phone

until all rooting work is done) (just to avoid accidents)

---

first, what didn't work:

1. >>> Windows 10 x64 rejects these because of missing signatures

android_cdc_driver.zip

https:##androiddatahost.com/b9cyw

android_vcom_driver.zip

https:##androiddatahost.com/56gty7

latest_usb_driver_windows-3.zip

http:##androidmtk.com/category/drivers

2. >>> starts, but hangs on doing something

SP_Flash_Tool_v5.1904_Win.zip

http:##spflashtools.com/category/windows

values for readback (as backup) should be

recovery START 108000 LENGTH 1138000

boot START c000000 LENGTH A25000

3. >>> starts, but I don't understand it, to advanced for me

SN_Write_Tool_v1.1828.00.zip

http:##snwritetool.com/category/download

4. >>> offers only much less than the twrp-recovery-mode

me.twrp.twrpapp-26.apk / the official-twrp-app

(and also the root-essentials-app has much more to offer)

---

what really worked is this:

1. >>> reiboot-for-android.exe / ReiBoot for Android 2.0.0.15

https:##zzz.tenorshare.com/products/reiboot-for-android.html

(the free version) installs working USB-drives

which you need to have on your pc before you can do anything else

adb and fastboot didn't find the phone before I had these USB-drivers installed

2. >>> adb and fastboot you can get from here

https:##developer.android.com/studio/releases/platform-tools

for example platform-tools_r28.0.3-windows.zip

rename the folder maybe to adb and place the folder in C:\ for example

3. >>> Magisk-v18.1.zip (or later version like Magisk-v19.2.zip)

https:##github.com/topjohnwu/Magisk/releases/tag/v19.2

(on this official site there is also an uninstaller)

4. >>> no-verity-opt-encrypt-6.0.zip

https:##build.nethunter.com/android-tools/no-verity-opt-encrypt/

(other advanced stuff is also there)

5. >>> MagiskManager-v7.2.0.apk (I used v7.1.2)

https:##github.com/topjohnwu/Magisk/releases/

after all flashing you have to install this app on your phone or you will not get root

they forgot to mention this important thing on https:##unofficialtwrp.com/gome-u7-twrp-3-2-root/

6. >>> Gome_U7_3.2.3.rar (which contains modified boot.img and recovery.img)

https:##zzz.mediafire.com/file/gw83x1y8d25gg5f/Gome_U7_3.2.3.rar/file

origin: https:##unofficialtwrp.com/gome-u7-twrp-3-2-root/

7. >>> original boot.img and recovery.img (also cache.img) from Gome_2017M27A_MT6757_V01_20180122.zip

for the case the you get stuck somewhere you can try to restore your phone with these

(for example you get stuck in an endless TWRP-loop or need the original state again somewhere else)

origin: https:##naijarom.com/gome-2017m27a

http:##zzz.mediafire.com/file/29985rqdffoa0m5/Gome_2017M27A_MT6757_V01_20180122.zip

8. >>> Root_Essentials_v2.4.9.apk (to verify your success)

http:##root-essentials.apk.black/

or somewhere else

---

create folder C:\apps

place these files there:

Magisk-v19.2.zip

no-verity-opt-encrypt-6.0.zip

MagiskManager-v7.2.0.apk

Root_Essentials_v2.4.9.apk

rename the folder Gome_2017M27A_MT6757_V01_20180122 to stock and place it in C:\adb

so you have original/stock-images in C:\adb\stock

extract Gome_U7_3.2.3.rar to C:\adb

---

now you can start your phone for the first time (if it's new)

what you choose now is not so important because it gets deleted later

settings >>> about phone >>> push build number 10 times >>> makes developer options available >>> go back

settings >>> developer options >>> activate oem bootloader unlock and usb debugging

start phone

connect phone-usb-cable to pc

confirm/allow the connection on phone

on pc >>> in menu >>> windows-system >>> right-click on shell >>> more >>> run as admin

go to platform-tools-folder (C:\adb) (with cd.. and so on)

>>> type: adb reboot bootloader

phone boots in fastboot-mode [small writing in left down corner in phone display]

on pc in shell >>> type: fastboot flashing unlock

>>> push (volume-)up-bottom on phone to confirm

on pc in shell >>> type: fastboot reboot

phone reboots and GOME-logo stays

>>> wait 10 minutes until new filesystem is created and let it start

repeat making developer options available, usb debugging, ...

on pc in shell >>> type: adb reboot bootloader

phone boots in fastboot-mode

>>> type: fastboot flash recovery recovery.img

>>> type: fastboot flash boot boot.img

>>> type: fastboot reboot

phone boots to TWRP-recovery (or use ReiBoot on pc for getting into recovery mode)

push erase in the right upper corner

use both kind of erases

first the right one, type "yes" if asked, the the sliding one, then reboot

(maybe delete cache too, I don't know about that one)

phone reboots to TWRP

click right down on exit/reboot then "to bootloader"

on pc in shell >>> type: fastboot continue

phone boots and GOME-logo stays

>>> wait 10 minutes until new filesystem is created and let it start

repeat making developer options available, usb debugging, ...

on pc in shell >>> type: adb push C:\apps /sdcard

on pc in shell >>> type: adb reboot

phone should reboot to TWRP-recovery

if not use ReiBoot on PC

or use pressing and holding (first the) power-button

and (then at the same time) up-buttom on phone until a menue appears

and then select it there (and press the down-bottom to confirm)

in TWRP-recovery choose Install (left upper corner)

install the both zips from /sdcard/apps

restart the phone

(...if you can't leave twrp-recovery and the phone endlessly loops, flash an image)

(...but prefer modified-images and use stock-images only if nothing else works)

(...or try formating /sdcard (in recovery) again)

(...or lock (and unlock) your phone again)

earlier or later your phone will boot normally again, then

install MagiskManager-v7.2.0.apk (from /apps)

to get ROOT rights

IT'S DONE!

you can verify that with Root_Essentials_v2.4.9.apk

HAVE FUN!

---

These instructions are still a little bit BETA.

I haven't verified everything yet down to the smallest detail.

Improvements/Suggestions welcome, like how-to get SP-Flash-Tool working.

---

and: I myself did this all to get a newer Operating System on my GOME U7.

Any ideas where I can find one?