Unlike modern Android ROMs, S60v3 "ROMs" are often modified firmware files (Cooked Firmware or CFW) created by editing the file using tools like NFE (Nokia Firmware Editor) .
Unlike modern Android custom ROMs, S60v3 "ROMs" usually refers to modified firmware ( Cooked Firmware ) or "hacking" the device to remove security restrictions: ROMPatcher+ s60v3 rom top