Using fastboot , she flashed it to the system partition.
For the Samsung Galaxy A04 (SM-A045X series), you can find community-built ROMs on platforms like the Samsung Galaxy-A05 SourceForge repository : samsung a04 custom rom
She pressed Vol Up to continue. The screen went black. Then a green Android logo lying on its back, chest open. Using fastboot , she flashed it to the system partition
That night, with a cup of tea gone cold, she enabled Developer Options. Tapped “OEM Unlocking” seven times until it blinked. Powered off. Held Vol Up + Vol Down while plugging the USB into her laptop. Then a green Android logo lying on its back, chest open
Technical Overview: Custom ROM Ecosystem for the Samsung Galaxy A04
A custom recovery acts as the gateway for installing ROMs. For the Galaxy A04 series, specialized recoveries are available: TWRP (Team Win Recovery Project) : Unofficial versions of TWRP 3.7.1 have been ported for the A045F (A04) and A042F (A04e). OrangeFox Recovery
Popular options include crDroid and Rising OS , which are frequently updated to the latest Android versions. Performance & User Experience