This is a module to enable FM Radio for Oreo 8.1 Stable released Yesterday.
Be aware that this module disables signature verification and sets selinux to permissive, which could be a security issue for someone.
If you want to use FM radio on Oreo 8.1 stable with all functions (Bluetooth streaming, recording, favourite stations) you can flash this module.
If you don't want to leave it always enabled you can enable it only when you need it, then reboot phone.
I'm using it and i haven't found bugs so far.
Use ONLY in stock rom versions:
FM4MIA1 Oreo 8.1 Stable
Alternative version (if you have bootloops):