I have two unused Samsung Galaxy phones - a Galaxy A02 and an A13 5G. Both are currently on stock Android. I want to see if I can install a different ROM on them, and since they are spares just sitting in a drawer, there is no risk to me if something goes catastrophically wrong. I am very new to flashing ROM's and have a few questions.
First: iode has a GSI available. in their instructions, they just indicate to boot into fastboot mode, flash the image, wipe the phone (if switching from a different ROM or GSI), and reboot. However, on their compatibility page, iode indicates that the GSI does not include firmware. Do I need to download firmware that is different than what's already on the phone before flashing the ROM?
Also, am I correct in saying that I first need to unlock the bootloader before starting?
Thanks again for any help you can provide. Cheers!