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.
: Many apps (like UPI or high-security banking apps) may block access if the bootloader is unlocked. You may need to use Magisk to hide your root status. custom rom for samsung a9 2018
Move the files to your phone's internal storage or an SD card. Boot to Recovery: Power off, then hold Volume Up + Power to enter TWRP. Wipe > Advanced Wipe and select Data, Cache, System, and Dalvik , find your ROM , and swipe to flash. Repeat for GApps/Magisk (optional). LineageOS 20 is fluid
Despite the hardware locks, the A9 had a saving grace: . Introduced by Google in Android 8.0 Oreo, Project Treble separated the vendor implementation (drivers for hardware) from the Android OS framework. Gaming (Call of Duty Mobile on medium settings)
If you downloaded Gapps, install them in the same way as the custom ROM.
Released with Android 8.0, this device's official updates have long ceased. Custom ROMs offer: Version Upgrades : Access newer Android versions (up to Android 15 via unofficial builds). Performance Boost
| ROM Name | Android Version | Stability | Customization | Battery Life | Best For | | :--- | :--- | :--- | :--- | :--- | :--- | | | 13 | High | Low | Excellent | Daily driver | | crDroid 10 | 14 | Medium | High | Good | Enthusiasts | | Pixel Exp. Plus | 13 | High | Medium | Very Good | Pixel fans | | Project Elixir | 13 | Medium-High | High | Good | Feature seekers |
