[RECOVERY]TWRP 3.3.1.0 for Galaxy A20

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samsald

Senior Member
Hi guys, can i install this recovery with this bl and rom?
 

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nofroyo

Senior Member
Sep 20, 2011
476
47
Sacramento
I am on BL & Firmware A205FXXS6ASL, I have successfully installed ROOT and got TWRP installed via odin. After i reboot my phone 2 times i get the red message. "only official samsung binaries can be flashed". Any suggestions on what i am doing wrong? i do wipe cache and divek cache too. sometime i do a full wipe and same error.

SM-205F dual sim - Region THL
 

physwizz

Senior Member
Sep 16, 2013
3,479
754
Sydney
I am on BL & Firmware A205FXXS6ASL, I have successfully installed ROOT and got TWRP installed via odin. After i reboot my phone 2 times i get the red message. "only official samsung binaries can be flashed". Any suggestions on what i am doing wrong? i do wipe cache and divek cache too. sometime i do a full wipe and same error.

SM-205F dual sim - Region THL
This twrp may not work with your firmware
It was made for S3 S4
You have s6.
 
Last edited:

nofroyo

Senior Member
Sep 20, 2011
476
47
Sacramento
I have A20F SN-A205F baseband A205FDD6S6ASL4

Twrp does install but sometimes I get error messages after flashing stuff like

"Won't install only boot offical binaries"
When I try to restore from a backup the phone boots up but sticks at the Samsung logo. Tried wiping cache/divek and factory reset and nothing.

Again just asking not looking for an ETA
 

physwizz

Senior Member
Sep 16, 2013
3,479
754
Sydney
I have A20F SN-A205F baseband A205FDD6S6ASL4

Twrp does install but sometimes I get error messages after flashing stuff like

"Won't install only boot offical binaries"
When I try to restore from a backup the phone boots up but sticks at the Samsung logo. Tried wiping cache/divek and factory reset and nothing.

Again just asking not looking for an ETA

We need a developer to start working on it before we can get an eta
 

physwizz

Senior Member
Sep 16, 2013
3,479
754
Sydney
I have A20F SN-A205F baseband A205FDD6S6ASL4

Twrp does install but sometimes I get error messages after flashing stuff like

"Won't install only boot offical binaries"
When I try to restore from a backup the phone boots up but sticks at the Samsung logo. Tried wiping cache/divek and factory reset and nothing.

Again just asking not looking for an ETA

Seems like you may not have completed the installation of TWRP.
Can you backup boot, data, system?
 
Last edited:

physwizz

Senior Member
Sep 16, 2013
3,479
754
Sydney
Last edited:

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    https%3A%2F%2Fimg.xda-cdn.com%2Fo_TqTetKlqCCLrVp5saYnMW-Xlw%3D%2Fhttps%253A%252F%252Fwww1-lw.xda-cdn.com%252Ffiles%252F2016%252F12%252Fteamwin-recovery-project-twrp-logo.jpg

    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.

    Code:
     * Your warranty is now void.
     * I am not responsible for bricked devices, dead SD cards, thermonuclear war, or your getting fired because the alarm app failed.
     * Please do some research if you have any concerns about features included in this Recovery
     * before flashing it! YOU are choosing to make these modifications
     * If you point the finger at me for messing your device. i will laugh at you

    Special Notes:*
    1. DON'T FORGET TO ENABLE "OEM UNLOCK" (located in Developers options).
    2. KNOX will be tripped once you flashed custom binaries to your phone.*
    (Your warranty may be voided. However this may not affect you if your country forces Samsung to provide hardware warranty regardless of software status.)
    3. Samsung Firmware OTA (aka System Updates) will no longer work once you flashed custom binaries.
    (You can flash custom ROMs if you want to keep the OS up-to-date.)
    4. All apps that use KNOX like Samsung pay, Secure Folder and maybe more will no more work.

    If you like my work please hit the "Thanks" button and feel free to donate to me via my Paypal

    Guide
    1.Make sure u have rooted device.
    If Not follow this (Root For U3,S3,S4)
    2. Download the custom recovery[TWRP]
    3. On the PC rename the unpatched recovery as recovery.img*
    4. Use 7zip to make it into recovery.tar*
    (right click and choose add to archive)
    5. Use 7zip to add your patched boot.img to recovery.tar
    (right click and choose add to archive and choose recovery.tar)
    6. Use 7zip to add vbmeta.img to recovery.tar
    (right click and choose add to archive and choose recovery.tar)
    7. Install recovery.tar to ap slot using Odin.
    To ensure that data is not encrypted*so as to enable data to be backed up follow these steps
    8. Boot the A20 into TWRP and mount everything that you can.
    9. Format Data (not just wipe)
    10. Flash*Disable_Dm-Verity.
    11. Reboot into Recovery. It will reboot into download mode.
    12. On the pc repeat step 7.
    13. Reboot phone and re-enter all data.
    14. Reboot into Recovery.
    15. Flash Magisk
    16. Backup*boot, data & system
    17. You can now restore boot, data & system.


    If u are getting vbmeta.img fotter error when booting to twrp Then flash this vbmeta.tar via odin ap solt.

    Downloads
    Twrp [U3][U4][S3][S4]
    Build with A205FXXS4ASJ4 Source.

    Thanks:
    TWRP team
    @topjohnwu for root
    @ianmacd for TWRP flash guide
    @afaneh92 for device tree
    - @fahadali2315 Good friend, Always support me

    Contributors
    @Agrim720

    Version Information
    Status:*Stable
    Current Stable Version:*1.0
    Stable Release Date:*2019-12-02

    Created*2019-12-02
    Last Updated*2019-12-17
    2
    Quick Root and TWRP.

    A quick method is found here.https://forum.xda-developers.com/galaxy-a20/how-to/guide-quick-root-twrp-galaxy-a20-t4069423

    Make sure you backup boot, data & system (not system image) before you go on to install GSIs

    This TWRP was originally designed for Android 9 but works perfectly with Android 10.
    It also comes with MTP built-in.
    1

    Fixed.
    Magic???
    Looking forward to seeing more A20 people with TWRP who can backup and restore. ?
    1
    Twrp will work.
    Bcz its built from December security patch sw source.
    U can try and report for U4.

    Im on U4 and it's confirmed that TWRP is working and installing custom kernel as well.