How to Install Custom ROM on Samsung Galaxy A23 [GSI build]

Samsung Galaxy A23 was silently launched in India as the successor to the Samsung Galaxy A22. The new Samsung smartphones run on Android 12 with the company’s One UI 4.1 skin. The Samsung Galaxy A23 sports a 50 MP primary camera, a 5 MP ultra-wide-angle camera, and two 2 MP cameras for macro and depth photography. The Samsung Galaxy A23 also sports an 8 MP selfie camera.

If you are here, you may probably want to install the Custom ROM on Samsung Galaxy A23. As you read our title, yes, we can guide you on installing the latest custom ROM on Samsung Galaxy A23 based on GSI build.

When you buy a new phone, it comes with so-called stock ROM or stock firmware which means a pre-installed operating system. This ROM usually comes with limited functionality defined by the OEM (phone manufacturer). A custom ROM is developed using AOSP, also known as Android Open Source Project. Yes, we all know that Android is open-source; therefore, any developer can edit the code or recompile it according to his or her need. You can read our complete article to understand the difference between Custom ROM and Stock ROM.

How to Install Custom ROM on Samsung Galaxy A23 [GSI build]

Flashing the ROM in Samsung Galaxy A23 is easy! All you need to do is follow the instructions carefully. If you are a newbie, then you need to understand that before flashing, you must unlock the bootloader on your Samsung Galaxy A23. To unlock the bootloader, follow our guide on how to unlock the bootloader via fastboot mode on any Android device.

If you have already unlocked the bootloader, you can simply follow our guide to install the custom ROM on Samsung Galaxy A23. Before that, let’s understand What is a GSI build.

What is GSI Stands for?

GSI stands for Generic system image, an Android System image that can be used to replace the current installed Android version with a new one. It is a pure Android with an unmodified Android Open Source Project (AOSP) code. With Android 8.1, Google introduced the project treble support for many devices. Now, with Android 9.0 Pie, Google finally added the API level 28 to support Generic System Images for all app developers to install and run the latest Android GSIs on various existing Android devices. To know more: Read here.

How to Install Custom ROM on Samsung Galaxy A23

To install, as we said, you need to unlock the bootloader and must have a TWRP (to install via a  device) or a PC (to install via Fastboot). Yes, two methods exist to install the custom ROM GSI on Samsung Galaxy A23.


AOSP GSIs which is still marked as a pre-release. Even on a device that runs Pie GSIs nicely, it’s still possible to get broken media, camera, RIL, or even flat-out no-boot. You are strongly advised to try PHH’s original and then identify/report issues there, before moving on to other GSIs that are based on his work. Please report bugs on the same thread related to the ROM.

We’re at GetDroidTips won’t be responsible for any kind of damage or error that occurs to your handset while or after following this guide. This is a Custom ROM and may contain some of the bugs or stability issues. We can’t recommend you to use this firmware as your daily driver. Proceed at your own risk.



A only arm32 – arm avN
A only arm64 – arm64 avN
A/B arm64 – arm64 bvN
A/B arm32 – arm bvN

Download Links:

Install via TWRP Recovery:

  1. To install via TWRP, you need to factory reset your device using TWRP
  2. Go into the Wipe option and Swipe to Factory Reset.
  3. Transfer the GSI build to your Samsung Galaxy A23 using a USB Cable.
  4. Once you have moved, you can remove your USB cable.
  5. In your TWRP, tap on the install button –> Change type to Install Image and find the GSI you have moved in the 3rd step.
  6. Confirm the flash by choosing the system partition
  7. Once done, you can reboot your device and wait a few minutes to boot up.

Flash via Fastboot

  1. First, do the factory reset on the Samsung Galaxy A23. There are two methods to do it, follow anyone.
    • Factory Reset When Powered On: To install without TWRP, you have to factory reset using your Umdigi A7 Pro factory reset option.
    • Factory Reset via Stock Recovery: Reboot your Samsung Galaxy A23 into stock recovery using a button combination or ADB command.
      adb reboot recovery
    • In your Stock Recovery, navigate using the Volume UP and DOWN button.
  2. Make sure to extract the downloaded GSI build.
  3. After resetting the factory ROM, you can now boot your device into bootloader mode using the adb command adb reboot bootloader.
  4. Now open the extracted folder of the GSI build; there, now open the command prompt window by holding the SHIFT KEY and Right Mouse click.
  5. In your command window, enter the command fastboot erase system
  6. To flash the system image, enter a command in the following format: fastboot -u flash system name_of_system.img
  7. Wait for the image to flash; it could take a few minutes. Once it has been completed, reboot your device manually via power key or by entering fastboot reboot and waiting for a few minutes to boot up.

We hope that this guide is helpful to you and you have successfully installed the Custom ROM on your Samsung Galaxy A23 handset easily. If anything goes wrong or you have any queries, feel free to ask in the comments below.

Credits to all the developer from XDA forum and 4PDA forum

Did you know?

You can always revert back to Stock ROM by flashing Stock ROM on Samsung Galaxy A23.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.