If you want your A8 to behave exactly like a Google Pixel phone.
For users who want to keep the Samsung One UI experience but are not ready for the latest Android 15/16 builds, TreeUI is an excellent, more mature alternative. Ported by XDA Senior Member VDavid003 from the Galaxy M31's firmware, this ROM brought Android 11 and One UI 3.1 to the Galaxy A8 series as far back as 2021, and it is known for its stability. It's a "full port" that provides many of the newer features Samsung introduced on its later devices. As it has been available for several years, it has received numerous updates and bug fixes, resulting in a very stable and refined daily driver.
Go to and tap Build Number 7 times to unlock Developer Options. galaxy a8 2018 custom rom
Connect your phone to the PC while still in TWRP and transfer the Custom ROM .zip file (and a GApps package if the ROM does not include Google Apps) to your internal storage. Tap on the TWRP main menu. Locate and select the Custom ROM .zip file. Swipe to confirm flash.
Click on the slot in Odin and select your downloaded TWRP .tar file. In the Odin Options tab, uncheck Auto Reboot . If you want your A8 to behave exactly
If you are looking for specific, stable builds, I recommend visiting the XDA Forum for Galaxy A8 2018 to find the most recent user-vetted GSI files. Before you begin, do you have a specific GSI in mind (e.g., Pixel Experience, LineageOS) or XDA Forums [ROM/TUTORIAL] Status of Android 12+ on the Galaxy A8
These are the most stable and feature-rich GSIs for Treble-supported devices, providing an excellent stock Android experience. LineageOS 19/20 GSI: Highly customizable and reliable. It's a "full port" that provides many of
Camera quality might be inferior to the stock Samsung camera app. Use a specialized GSI-compatible GCam port.
Back up your photos, contacts, documents, and messages. This process completely wipes your phone.
Now for the main event. Here are the most popular and stable custom ROMs currently available for the device.