1. Are you ready for the Galaxy S20? Here is everything we know so far!

Manually upgrading firmware after failed OTA

Discussion in 'Android Devices' started by Earendil_Strife, May 4, 2021.

  1. Earendil_Strife

    Thread Starter

    Hi guys, I am trying to upgrade the firmware on a recently adquired A20. OTA upgrade keeps failing on a specific patch, the one that goes right before the big Android 10 firmware update. Now, I downloaded manually the stock ROM, but Iam really hesitant about flashing it manually. My concern is about why did the OTA failed if it should have downloaded the "correct" firmware, what if this "correct" stock ROM I downloaded is also incompatible and I brick the phone. Im listing below as much info as I can

    Model: Samsung Galaxy A20 (SM-A205G)
    Android version: 9
    One UI: 1.1
    Baseband: A205GNDXU4ASK2

    Samsung Smart Switch info:
    Current Software version:pDA:SK2/ CSC: SK2/ PHONE: SK2 (TPA)
    Latest software version: PDA:UC1/ CSC: UC2/ PHONE: UC1(TPA) Size 3054 Mb (cant use directly this method because Im working via a proxy)

    Failed OTA firmware: A205GUBS5ATA1 (this is the one that failed, acording to Samsung update list is the patch that "goes" right before the Android 10 update.

    Now, I downloaded from https://sfirmware.com/es/ a stock ROM listed for this model and matching the PDA and CSC recommended by Smart Switch containing the following:


    The question of couse is: is this the correct ROM for my device?

    1. Download the Forums for Android™ app!


  2. Earendil_Strife

    Thread Starter

    Update. Looking up I fount the probable cause, and its something about the "security version" In my baseband is U4 and both the OTA update and the one I found online are S9. The website said they should coincide, that may be the reason the OTA didnt stick. Should I flash manually anyways??
  3. ocnbrze

    ocnbrze DON'T PANIC!!!!!!!!!

    you can always use smart switch to update your phone:
  4. ocnbrze

    ocnbrze DON'T PANIC!!!!!!!!!

    or you can go to sammobile and flash the firmware yourself:

    just make sure that you flash the correct firmware specifically for your phone. so make sure you look it up using the correct model number and country code.
  5. Techemma

    Techemma Lurker

    Make sure the ROM your getting has no real bugs. Being a non- OTA update you need to be careful for the issue on firmware that you're getting. Also must check the rom design for your mobile model and region.

Samsung Galaxy A20 (2019) Forum

The Samsung Galaxy A20 (2019) release date was April 2019. Features and Specs include a 6.4" inch screen, 13MP camera, 3GB RAM, Exynos 7884 processor, and 4000mAh battery.

April 2019
Release Date

Share This Page