I use LineageOS, which has step-by-step instructions on how to prepare your phone/install the OS. A list of supported devices is at https://wiki.lineageos.org/d

I use LineageOS, which has step-by-step instructions on how to prepare your phone/install the OS. A list of supported devices is at https://wiki.lineageos.org/devices/ https://wiki.lineageos.org/devices/, with various guides on each device-specific page.