[Samsung Galaxy M12] physwizz:
Installing Custom Recoveries

A. Preparation.

1. Download firmware for your device

2. Extract ap file using Zarchiver and extract recovery.img from recovery.img.lz4 and compress it to recovery.tar

3. Patch the ap file with a magisk which will patch both boot.img and vbmeta.img (from magisk, choose install then select file to patch)

Alternatively you can extract boot.img.lz4 and vbmeta.img.lz4 from the ap file and compress them into a new tar file and then patch that file.

note: if you don't want root then just extract the vbmeta.img and use zarchiver to add it to my twrp.tar file.

You can flash this new file from odin at step 5

For Exynos 850 android 11 use a21s patched magisk.

For Exynos 850 android 12 and most other devices use delta magisk

4. Unlock OEM in developer options

5. Attach phone to pc and reboot to download mode

6. flash patched ap file.

Or..

Extract boot.img and vbmeta.img and add them to the TWRP zip.

7. Download the zip and extract the twrp.tar and extract recovery.img using Zarchiver.

B.Installation

Method 1.

1. Connect to pc and boot into stock recovery

2. Factory reset

3. Reboot into download mode.

4. flash twrp.tar into the ap slot

5. reboot to recovery from main menu (not just reboot)

be patient- It may take a while

6. Advanced, terminal. Type multidisabler (twice).

7.

Or flash samsung multidisabler zip

Or, for older phones flash dmverity zip

8. Reboot to recovery from main menu (not just reboot)

Backup boot, data, super and dtbo

9. Reboot to system

Method 2.

If you have already installed recovery and decrypted.

Extract recovery.img

1. Boot to recovery.

2. Install recovery.img

3. Choose recovery partition

4. Reboot to system then reboot to recovery

Backup boot, data, super and dtbo

(For Pitch-black just install the zip)

Method 3.

1. Install TWRP app

Extract recovery.img

2. Install TWRP

3. Choose file to flash.(don't select device)

4. Select recovery.img.

5. Reboot to recovery.

6. (You may need to change data partition to ext4 first if format ruins your system)

7. Reboot to recovery.

8. Wipe, format data, type YES.

9. Advanced, terminal.

10.Type multidisabler (twice).

Or flash samsung multidisabler zip

Or, for older phones flash dmverity zip

11.Reboot to recovery

12. Flash Magisk for root(only for method 3)

13. Backup boot, data, super and dtbo

Method 4

Using a second phone

C. Recovery Problems

Most recovery issues can be solved by attending to the following issues.

1. Did you root using the full ap file patched Magisk .

(This contains the patched boot.img and vbmeta.img)

Exynos 850 users must use the special a217 magisk?

2. Did you then go all the way through the setup process?

3. Did you download the recovery to match your device

4. Did you hold down power and volume up after Odin says pass?

5. Did you format data from stock recovery?

If you forgot to do this, just install stock recovery.img from TWRP and reboot.

6. Did you type multidisabler twice?

7. Did you reboot to recovery by choosing reboot from the menu and then choosing recovery?

8. To avoid touch issues go to settings and untick "allow time out"

D.To restore Stock Recovery

1. Attach phone to pc and reboot to download mode

2. flash patched ap file or stock recovery.tar

3. reboot

Or just flash stock recovery.img from twrp and reboot.

TWRP Building Guide

Guide to TWRP building

TWRP for a12s ============= 1. Setup -------- sudo apt update sudo apt upgrade sudo apt-get install git-all sudo apt install python-is-python3 git config --global user.email "your email" git config --global user.name "your name" 2...

xdaforums.com

@physwizz

These TWRPs are all derived from my a127f device tree.

Code

physwizz - Repositories

physwizz has 284 repositories available. Follow their code on GitHub.

github.com