For the Samsung Galaxy A9 (2018) (model SM-A920), installing a custom ROM is a popular way to bypass its official Android 10 update limit and reach newer versions like Android 15 via GSIs. Essential Preparation
Select "Install" and navigate to the location where you downloaded the custom ROM. Select the ROM and follow the on-screen instructions to complete the installation. custom rom for samsung a9 2018
Long-press Volume Up to unlock the bootloader; the device will factory reset. 2. Flash Custom Recovery (TWRP) For the Samsung Galaxy A9 (2018) (model SM-A920),
Performance & Daily Use: 9/10 Wow. The difference is night and day. Stock One UI 2.1 feels like wading through molasses. LineageOS 20 is fluid. Apps open faster, the app drawer doesn’t stutter, and the 6GB of RAM finally feels like 6GB. UI transitions are smooth at 60Hz (the screen is only 60Hz anyway). Gaming (Call of Duty Mobile on medium settings) is actually more stable because the CPU isn’t throttling under Samsung’s thermal profile. Long-press Volume Up to unlock the bootloader ;
Who should absolutely avoid this?
Extended Software Support: While official updates stopped at Android 10, custom ROMs can bring your device up to Android 12 or 13 via GSI (Generic System Image) or unofficial builds.
PixelOS – For the Purist