Step 1: Unlock Bootloader
Step 2: Flash TWRP via ODIN
Step 3: Wipe Partitions
Step 4: Flash the Portable ROM
Step 5: Reboot and Patience
After scouring XDA Developers, Telegram groups, and 4pda forums, these are the most stable portable builds available in 2024-2025.
Older Android 9 build. More stable for daily use, but security patches outdated. samsung a01 core custom rom portable
Verdict for new users: Start with LineageOS 18.1 Go Portable. It is the most forgiving for beginners.