[General Questions and Answers] m2m4m5:
the instructions in my last post seem still not to work properly

on a new phone (or a fully set-back one)

so here is my last try:

(I'm tired off this)

----- ----- ----- ----- ----- -----

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)

---

(on Windows 10 x64 usually other driver-installation-methods fail, so)

install ReiBoot-for-Android-2.0.0.15 (the free version is good enough)

>>> and run it at least once to let it finish its usb-driver-installation

extract platform-tools_r28.0.3-windows.zip somewhere

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

extract Gome_2017M27A_MT6757_V01_20180122.zip somewhere

(and delete the Gome_2017M27A-folder later to save space)

copy folder Firmware from it to C:\adb and rename it to stock

you have now the original-images in C:\adb\stock

create a folder C:\adb\twrp

and extract Gome_U7_3.2.3.rar in it

create folder C:\adb\2017

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

Magisk-uninstaller-20190520.zip [maybe]

---

first, connect the phone with the usb-cable to the pc

then go into recovery-mode

>>> for this turn the phone on

let it boot normally

and start ReiBoot on your PC

and click enter-recovery-mode

if this not works (but it should)

>>> press and hold the power-button on your phone

and (then at the same time) the (volume-)up-button

until a menue appears,

release then first the power-button

and then the (volume-)up-button,

select what you want there with the (volume-)up-button

and press then the (volume-)down-button to confirm it

in [stock-]recovery-mode

>>> select wipe-data/factory-reset

confirm this with the power-button

>>> select yes-delete-everything

confirm it with the power-button

>>> select power-off

confirm it with the power-button

phone charges (should be 100%)

turn it on

GOME-logo stays for 5 minutes and phone gets newly initialised

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

go to settings >>> scroll down to about phone

>>> push build-number 7 times >>> this makes developer-options available >>> go back

settings >>> developer-options >>> activate oem-bootloader-unlock and usb-debugging [if they are not]

on pc >>> in windows-menue >>> windows-system >>> shell (/cmd)

[it's the command-line-modus in a window] (maybe start it as administrator)

go to platform-tools-folder (C:\adb) (for example with the command cd\adb)

>>> type: adb devices >>> no device found [maybe] (or unauthorized)

confirm/allow the connection on phone (permanently)

>>> type: adb devices >>> phone found (shows serial)

>>> 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

(don't flash anything now, because it doesn't save time) [believe me]

>>> type: fastboot reboot

GOME-logo stays for 5 minutes and phone gets newly initialised

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

make developer-options and usb-debugging available again

(you can verify it again with: adb devices)

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

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

on pc in shell >>> type: fastboot flash boot twrp\boot.img

--- DO NOT FLASH THE RECOVERY-IMAGE NOW ---

on pc in shell >>> type: fastboot reboot

phone reboots and after a while

the message -- ERASING -- appears

and the phone reboots again

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

on pc in shell >>> type: fastboot flash recovery twrp\recovery.img

now turn off the phone

now turn on the phone

phone boots to normal system

now go into recovery-mode

for this start ReiBoot on your PC and click enter-recovery-mode

you can do it also this way:

>>> press and hold the power-button on the phone

and (then at the same time) the (volume-)up-button

until a menue appears,

release then first the power-button

and then the (volume-)up-button,

select what you want there with the (volume-)up-button

and press then the (volume-)down-button to confirm it

the phone reboots to TWRP-recovery

TWRP-recovery wants to decrypt data now

(because it can't access the data-partition)

>>> press cancel

then something in Russian appears

press the right grey button, scroll up and choose english

now slide the blue-white arrow on the bottom to the right

now >>> choose Wipe (in the right upper corner)

>>> choose Format Data

>>> type yes

... let it work / erase all your data

>>> push Reboot System

phone boots and GOME-logo stays for 5 minutes

>>> wait until your phone is initialized / ready again

choose now what you really want (name, ...) / setup your phone properly

then >>> make developer-options and usb-debugging available again

on pc in shell >>> type: adb push 2017 /sdcard

>>> start ReiBoot on PC and click enter-recovery-mode

phone reboots to twrp-recovery in Russian

press right grey button, scroll up, choose english and press ok

(maybe mark never-show-this-question-again)

slide the blue-white arrow on the bottom to the right

in TWRP-recovery choose Install (left upper corner)

choose Magisk-v19.2.zip from /sdcard/2017

add more zips

choose no-verity-opt-encrypt-6.0.zip

mark reboot after installation

slide blue-white arrow on bottom to right

phone reboots to normal system

MagiskManager_7.2.0 is now already installed [for whatever reason]

[the full version] (it is recommended to run it at least once)

[if it's not the full version you can install it from /2017]

install Root_Essentials_v2.4.9.apk now

to do so open settings and allow unknown-sources

run Root-Essentials now

a super-user-request appears >>> grant (and allow-forever)

in its tools >>> scroll down and choose root-checker

message: root-privileges found

>>> ROOT <<<

---

Magisk-Manager seems to be necessary [with these instructions]

if you uninstall it, some things will work, some things not,

because of the settings it has already stored somewhere

---

and: do not lock your phone again

with twrp-recovery is flashed / installed

because it's totally not working (but I can't remember exactly)

---

UNTESTED / maybe you want to go an additional round

and Format Data again in twrp

> because magisk was installed after the format <

[just a thought] [theoretically this could be good (or wrong)]

(but every data would be gone again after that)

(and you would have to repeat some of the steps before)

(so, normally you shouldn't do that)

---

in rare cases if you try to install apk-files

which you have copied from your pc to your phone

with the apk-push-command a message appears

that the file-format of the files is not supported

then simply change the name of the folder

on your phone in which the apk-files are stored

this works but has to be done again for new files

(decide by yourself that this is reason enough

to setup / re-install everything new or not)

---

IF YOUR PHONE ENDLESSLY LOOPS TO TWRP-RECOVERY

you have flashed the modified-boot-image

and the modified-recovery-image at the same time

solution: flash the stock-recovery-image again

then the -- ERASING -- message appears

and the phone boots normally after that to GOME

you can now flash the modified-recovery-image again

and try to get everything working

but it's better to give it a completely new start

and to FOLLOW THESE INSTRUCTIONS:

connect usb-cable to pc and phone

in twrp press Reboot >>> Bootloader

on pc >>> windows-menue >>> windows-system >>> shell (/cmd)

go to platform-tools-folder (C:\adb) (for example with cd\adb)

on pc in shell >>> type: fastboot continue

phone boots normally (this one time) [in most cases]

backup your personal data to an external place (sd-card, internet)

then remove the sd-card (as example) with your personal stuff

from the phone until everything is done / you are root

restart the phone >>> you are now in twrp-recovery-again

in TWRP-recovery choose Wipe (right upper corner)

>>> choose Format Data

>>> type yes

... let it work / erase all data

>>> push Reboot System

phone boots to twrp-recovery again

press Reboot >>> Bootloader

on pc in shell >>> type: fastboot continue

phone boots and GOME-logo stays for 5 minutes

>>> wait and let it start

go to settings >>> scroll down >>> about phone

>>> push build-number 7 times (makes the developer-options available) >>> go back

(in settings) >>> developer-options >>> activate oem-bootloader-unlock and usb-debugging

on pc >>> in windows-menu >>> windows-system >>> shell (/cmd)

go to platform-tools-folder (C:\adb) (for example with cd\adb)

>>> type: adb devices >>> no device found [maybe] (or unauthorized)

confirm/allow the connection on the phone (permanently)

>>> type: adb devices >>> phone found (shows serial)

on pc in shell >>> type: adb push 2017 /sdcard

on pc in shell >>> type: adb reboot

in TWRP-recovery choose Install (left upper corner)

choose Magisk-uninstaller-20190520.zip from /sdcard/2017

(or Magisk-uninstaller-20190204.zip if you have used Magisk-v18.1.zip)

mark reboot-after-installation

slide blue-white arrow on the bottom to the right

phone boots to twrp-recovery again

choose Reboot (lower right corner)

choose Bootloader

phone reboots in fastboot-mode

fastboot flash boot stock\boot.img

fastboot flash cache stock\cache.img

fastboot flash recovery stock\recovery.img

fastboot flashing lock

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

push and hold the power-button on your phone until it turns off

now let it charge to 100%

>>> START NEW <<<

from the beginning

[and: you can skip

the backup-of-personal-data-part

then because you have already done that]

---

file-references: (adresses may look strange, [correct them!]

but new posters is it not allowed to post fully working links)

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

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

((even) the free version) installs (on x64) working USB-drivers

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

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

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

(on this official site there is also the 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

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

after all flashing you should have this app installed on your phone or you will not get root [in most cases]

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

[sometimes this app gets installed with the Magisk.zip, depending on the version of it (or whatever)]

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

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 that something bad happens you can restore your phone with these

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

---

things / files which didn't work (for me) are these:

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

maybe a working Windows-x64-vcom-driver is missing

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

it's old and to advanced

SN_Write_Tool_v1.1828.00.zip

http:##snwritetool.com/category/download

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

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

[and also the root-essentials-app offers much more]