Out of the box, the Galaxy A02 comes pre-installed with Samsung’s One UI Core. While One UI is feature-rich, the "Core" version found on budget devices is often stripped down yet still bloated with carrier apps, Samsung Pay mini, and duplicate services that run in the background. LineageOS is a "clean" Android experience. It strips away the unnecessary extras, freeing up valuable RAM and storage space. On a device with only 32GB of storage, this reclaimed space is vital.

, which is a critical first step for any Samsung custom ROM installation. The Process Custom Recovery : You’ll typically use Odin on a PC to flash a custom recovery like Flashing the OS : Once in TWRP, you format data and wipe the system

I understand you're looking into running on a Samsung Galaxy A02 (SM-A022F/DS, etc.).

Samsung officially provides major OS updates for the A-series, but the budget A02 has a limited lifecycle. Official support for security patches will eventually cease. LineageOS allows you to run the latest version of Android (often versions newer than what the hardware officially supports), keeping your device secure and modern long after Samsung has moved on.

Some developers on have attempted unofficial LineageOS 17.1/18.1 ports. Search for: