[RECOVERY] [UNOFFICIAL] TWRP 3.4.0-0 for Galaxy A20e (A202F)

[Xyn XDotnest]

Team Win Recovery Project 3.x, or TWRP3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.

#include <std_disclaimer.h>
/*
 *
 * We are not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at us for messing up your device, we will laugh at you.
 *
 */

I’d recommend to read everything in this post, if you care about your phone.

1. If you already unlocked your bootloader, start with step 3.
2. First you need to unlock your bootloader. You can do so by enabling developer settings first, enable oem unlocking, then shut down your phone, hold volume up and down at the same time and while holding them plugin your charger. Your phone now should show a green screen with instructions to unlock the bootloader. Just follow them and after the unlocking your data should get wiped. After that your device will boot up and land in setup screen. Do not setup anything, just skip as much as possible, because your phone will get wiped again. Enable developer settings and make sure oem unlocking is greyed out and enabled. (If it does not show up, connect to a network first!)
3. Flash Galaxy A20e TWRP.tar via Odin or heimdall
4. Reboot into TWRP AS SOON AS THE FLASHING PROCESS IS DONE because otherwise TWRP will get replaced with the stock Android recovery
5. If you want to flash a GSI, skip to step 7
6. Factory reset in TWRP and reboot to stock
7. Wipe everything in TWRP excluding SD Card / USB OTG
8. Put a GSI image file onto an SD Card, alongside GSI_Fix_boot.zip and Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip
9. Flash the GSI image, flash Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip, flash GSI_Fix_boot.zip, wipe cache and reboot.
10. Enjoy

Current bugs

• Encryption/Decryption on stock does not work, you cannot read the internal storage while using the stock firmware
• ADB and USB connection / USB OTG does not work

Latest release: https://drive.google.com/file/d/1Nbrmn7BgA3BxA1bqnLXYMuCY4KjpR0Vn/view?usp=sharing

Social media

• Twitter: https://twitter.com/xyn_dev
• Telegram: https://t.me/xyn_dev

 

[Xyn XDotnest]

Reserved.

 

[Wire1122]

Wow finally... thx a lot for that

 

[physwizz]

Reserved.

Great work
Can you now install GSIs
Make sure you backup boot, data, system before you start

 

[Xyn XDotnest]

Great work
Can you now install GSIs
Make sure you backup boot, data, system before you start

Yep, GSIs work, I am currently using Descendant X on mine.

 

[physwizz]

Yep, GSIs work, I am currently using Descendant X on mine.

Beautiful

 

[ZemoDroid]

I'm stuck at GSI (PixelExperience) installation. I've extracted the img file on sd card and the wizard is asking which partition should be used to flash image (boot,recovery,product image,system image,vendor image).

 

[physwizz]

I'm stuck at GSI (PixelExperience) installation. I've extracted the img file on sd card and the wizard is asking which partition should be used to flash image (boot,recovery,product image,system image,vendor image).

System

 

[Moogle]

A few Questions about the process

Team Win Recovery Project 3.x, or TWRP3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.

#include <std_disclaimer.h>
/*
 *
 * We are not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at us for messing up your device, we will laugh at you.
 *
 */

I’d recommend to read everything in this post, if you care about your phone.

1. If you already unlocked your bootloader, start with step 3.
2. First you need to unlock your bootloader. You can do so by enabling developer settings first, enable oem unlocking, then shut down your phone, hold volume up and down at the same time and while holding them plugin your charger. Your phone now should show a green screen with instructions to unlock the bootloader. Just follow them and after the unlocking your data should get wiped. After that your device will boot up and land in setup screen. Do not setup anything, just skip as much as possible, because your phone will get wiped again. Enable developer settings and make sure oem unlocking is greyed out and enabled. (If it does not show up, connect to a network first!)
3. Flash Galaxy A20e TWRP.tar via Odin or heimdall
4. Reboot into TWRP AS SOON AS THE FLASHING PROCESS IS DONE because otherwise TWRP will get replaced with the stock Android recovery
5. If you want to flash a GSI, skip to step 7
6. Factory reset in TWRP and reboot to stock
7. Wipe everything in TWRP excluding SD Card / USB OTG
8. Put a GSI image file onto an SD Card, alongside GSI_Fix_boot.zip and Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip
9. Flash the GSI image, flash Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip, flash GSI_Fix_boot.zip, wipe cache and reboot.
10. Enjoy

Current bugs

• Encryption/Decryption on stock does not work, you cannot read the internal storage while using the stock firmware
• ADB and USB connection / USB OTG does not work

Latest release: https://drive.google.com/file/d/1Nbrmn7BgA3BxA1bqnLXYMuCY4KjpR0Vn/view?usp=sharing

Social media

• Twitter: https://twitter.com/xdotnest
• Telegram: https://t.me/dotnest

,
Hey thanks for this, I´ve got a few questions about the process that might also help others.
Do you recommend this method of rooting still over the new method using Magisk?
Do we still need to wipe everything in TWRP after first boot? And what specifically steps should we take to wipe?
Can you recommend any specific GSI images that are known to boot on the A20e (A202F) because so far I've tried LineageOS 17.1 / AOSP system -quack-arm64-ab-gapps.img and system -quack-arm64-ab-vanilla.img / Crdroid and nothing gets past the loading icon.
Do we still need to flash Disable_Verity_ForceEncrypt and GSI_Fix_boot.zip if not installing a GSI ?

 

[Moogle]

a few notes

for anyone else. It helps if you boot into the rom and install magisk manager via APK (recent version is fine) before installing it via TWRP. After I did that rooting worked properly.
Lost ADB for some reason though, might be unrelated.

I also think that the a20e (SM-a202f) is an A device and not an A/B partition device at least according to treble check app.

ADB and USB connection / USB OTG does not work

oh.....right. that stinks

 

[physwizz]

,
Hey thanks for this, I´ve got a few questions about the process that might also help others.
Do you recommend this method of rooting still over the new method using Magisk?
Do we still need to wipe everything in TWRP after first boot? And what specifically steps should we take to wipe?
Can you recommend any specific GSI images that are known to boot on the A20e (A202F) because so far I've tried LineageOS 17.1 / AOSP system -quack-arm64-ab-gapps.img and system -quack-arm64-ab-vanilla.img / Crdroid and nothing gets past the loading icon.
Do we still need to flash Disable_Verity_ForceEncrypt and GSI_Fix_boot.zip if not installing a GSI ?

1. This method does use Magisk
The tar file contains boot.img patched with Magisk
It also contains recovery.img and vbmeta.img
2. The boot.img is from Android 10 firmware so you need to upgrade to Q first.
3 there is a step missing in the instructions
It should say

6. Reboot the A20e into TWRP and mount everything you can.
Click Wipe then Format Data (not just wipe) - don't restart
Flash Disable_Dm-Verity_ForceEncrypt
Reboot to recovery and wipe both caches
Reboot system .

You can then backup boot, data and system for stock.
You can then install GSIs

 

[Moogle]

I'm having some major problems with sd cards not being recognized by google play store as external storage and whatsapp unable to download images. any idea what it might be?

 

[physwizz]

I'm having some major problems with sd cards not being recognized by google play store as external storage and whatsapp unable to download images. any idea what it might be?

What OS are you running?

 

[Moogle]

What OS are you running?

Just the stock android 10, I didn't find a GSI that worked for me.

 

[physwizz]

Just the stock android 10, I didn't find a GSI that worked for me.

try Crdroid

 

[Moogle]

try Crdroid

Already have, and LOS 17.1 and AOSP system-quack-arm64-ab-vanilla
all of them got stuck at boot icon for an hour. Thats why I went back to stock.

I'm more interested in why I cannot seem to install discord or firefox from the app store, or whatsapp cannot download images.

 

[physwizz]

Already have, and LOS 17.1 and AOSP system-quack-arm64-ab-vanilla
all of them got stuck at boot icon for an hour. Thats why I went back to stock.

I'm more interested in why I cannot seem to install discord or firefox from the app store, or whatsapp cannot download images.

Go into magisk and hide any apps that misbehave

 

[Moogle]

Go into magisk and hide any apps that misbehave

Tried it, no change, there's no apps misbehaving, just strange sd storage card behaviour

Is the SM-A202F/DS supported by these methods, I noticed in some other threads it wasn't working back in March, that's the unit I have.

 

[physwizz]

Tried it, no change, there's no apps misbehaving, just strange sd storage card behaviour

Is the SM-A202F/DS supported by these methods, I noticed in some other threads it wasn't working back in March, that's the unit I have.

There is a fix here

https://forum.xda-developers.com/showpost.php?p=80184282&postcount=2

 

[Moogle]

There is a fix here

https://forum.xda-developers.com/showpost.php?p=80184282&postcount=2

Which part are you referring to in that thread?