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

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overko24

New member
Nov 3, 2020
2
0
my phone is tuck on teamwin logo and i can't enter fastboot, it just stays there i attached it to pc but it says nothing on odin or adb, any way to get out of this?
 
Feb 7, 2020
30
1
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.



I’d recommend to read everything in this post, if you care about your phone.
If you already unlocked your bootloader, start with step 3.
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!)
Flash Galaxy A20e TWRP.tar via Odin or heimdall
Reboot into TWRP AS SOON AS THE FLASHING PROCESS IS DONE because otherwise TWRP will get replaced with the stock Android recovery
If you want to flash a GSI, skip to step 7
Factory reset in TWRP and reboot to stock
Wipe everything in TWRP excluding SD Card / USB OTG
Put a GSI image file onto an SD Card, alongside GSI_Fix_boot.zip and Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip
Flash the GSI image, flash Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip, flash GSI_Fix_boot.zip, wipe cache and reboot.
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

I have already an older one twrp Version a version Where the system cannot be mounted on Android 10 (twrp 3.3.1-0) What do I have to flash then?i have already no Encryption and no_dmverify

---------- Post added at 06:59 AM ---------- Previous post was at 06:56 AM ----------

I have already an older one twrp Version a version Where the system cannot be mounted on Android 10 (twrp 3.3.1-0) What do I have to flash then?i have already no Encryption and no_dmverify
Only the recovery and then boot in?
 

physwizz

Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney
    I have already an older one twrp Version a version Where the system cannot be mounted on Android 10 (twrp 3.3.1-0) What do I have to flash then?i have already no Encryption and no_dmverify

    ---------- Post added at 06:59 AM ---------- Previous post was at 06:56 AM ----------


    Only the recovery and then boot in?

    Extracting the recovery.img and flash to recovery slot using TWRP.
    More options here
    https://forum.xda-developers.com/galaxy-a20/development/a20e-testers-t4183683
     
    Last edited:

    physwizz

    Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney
    my phone is tuck on teamwin logo and i can't enter fastboot, it just stays there i attached it to pc but it says nothing on odin or adb, any way to get out of this?

    To go to download mode

    Normal method
    1. Turn off phone
    2. Hold down both volume keys
    3. Plug in computer

    Bootlooping
    1. Plug in to computer
    2. Hold down both volume keys

    For a difficult phone
    1. Connect usb to computer but not to phone
    2. Hold down all 3 keys
    3. When it buzzes release power and quickly plug in usb to phone.
    It might take a few times to get it right.

    If it's REALLY BAD
    1. Wait for the battery to completely run down and use normal method.
     

    Borderliner

    New member
    Nov 19, 2011
    1
    0
    hi there,
    i flashed the crdroid img gsi step by step, i think it will work anyway. how much time takes the first boot roundabout? it feels like hours for the moment^^ i think its maybe a bit too long. should i just keep waiting or look for another option ?
     

    physwizz

    Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney
    hi there,
    i flashed the crdroid img gsi step by step, i think it will work anyway. how much time takes the first boot roundabout? it feels like hours for the moment^^ i think its maybe a bit too long. should i just keep waiting or look for another option ?
    It should take about 30 minutes
     

    physwizz

    Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney

    hhuckebein

    Member
    Aug 4, 2018
    5
    0
    EDIT solved my problems on my own, here is the feedback:

    first) I uploaded the three files from the first message in this thread to my A202F, but the phone was always rebooting to TWRP greeting screen, then stuck. Nothing but forcing a reboot with vol+ and power button for some seconds was possible.

    second) saw the postings from Nomember 23 - I managed to reboot into download mode in a slightly different way, that is by forcing reboot as described above until screen gets black, then, BEFORE phone buzzes: release phones power button and connect computer => then it boots into download mode. You have 1-2 seconds time between the screen gets black and the phone really reboots.

    third) saw that there is a newer TWRP than the one from the first message (my version 3.4.0_0 linked in a later post from October) - I flushed that one on the phone and voilà: everything working!

    Thank you a lot for providing that software!
     
    Last edited:

    physwizz

    Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney
    EDIT solved my problems on my own, here is the feedback:

    first) I uploaded the three files from the first message in this thread to my A202F, but the phone was always rebooting to TWRP greeting screen, then stuck. Nothing but forcing a reboot with vol+ and power button for some seconds was possible.

    second) saw the postings from Nomember 23 - I managed to reboot into download mode in a slightly different way, that is by forcing reboot as described above until screen gets black, then, BEFORE phone buzzes: release phones power button and connect computer => then it boots into download mode. You have 1-2 seconds time between the screen gets black and the phone really reboots.

    third) saw that there is a newer TWRP than the one from the first message (my version 3.4.0_0 linked in a later post from October) - I flushed that one on the phone and voilà: everything working!

    Thank you a lot for providing that software!
    Try my kernel

     

    soadfan

    Senior Member
    Mar 4, 2011
    166
    6
    Sofia
    I'm on a boot loop, after step 6. This makes me think the factory reset option in TWRP is just wiping partitions leaving no files to boot?

    EDIT: yep, /system has only one bin dir, which is empty^^
     
    Last edited:

    andrepd

    Senior Member
    Dec 4, 2011
    85
    3
    Hi. Nothing happens when, after checking "OEM unlock" in developer settings and powering off, I press volume up+down and connect with cable. It just charges, no screen with instructions. Do you have any idea what I might be doing wrong?

    EDIT: Connected to PC instead of to charger and it worked!
     

    physwizz

    Senior Member
  • Sep 16, 2013
    2,807
    586
    Sydney
    Hi. Nothing happens when, after checking "OEM unlock" in developer settings and powering off, I press volume up+down and connect with cable. It just charges, no screen with instructions. Do you have any idea what I might be doing wrong?

    EDIT: Connected to PC instead of to charger and it worked!
    Great.
    Try my kernel
     

    cobracuspideira

    New member
    Feb 2, 2021
    1
    0
    Hey guys, i have a A202F , and i still am unable to complete all the steps mentioned in the first post.

    When i reach this step:
    "9. Flash the GSI image, flash Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip, flash GSI_Fix_boot.zip, wipe cache and reboot."


    I tried with lineageos, AOSP and pixel experience , all with android 10 A/B ARM64. Everyone one of them after i install the image , on the logs of TWRP starts to state that " failed to mount system (invalid argument) ".

    If from that point i try to install " Disable_Dm-Verity_ForceEncrypt_03.04.2020.zip, flash GSI_Fix_boot.zip" it gives me the same log error message. I reboot to recovery then to system and it keeps bootlooping.

    The only way to fix the " failed to mount system (invalid argument) " message is to wipe everything again, and that message disapears.

    Also i notice that installing the rom images ,it goes quite fast, less than a minute. Could it be something i forgot to do? (i did all the steps before from the 1st post)

    If you could help, that would be greatly appreciated
     

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    • 5
      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:
      #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
      1
      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
      1
      The A202F is an A/B device, despite what Treble Checker apps say. Only A/B GSIs will boot on it, as far as SD Card issues go, I cannot reproduce them, SD Cards work perfectly well in any GSI I've tried.

      Yes
      The a205xx is a fake ab (a plus SAR)
      Glad to hear the GSIs are working for you.
      Any custom ROMs for your device?