Because the N9 runs on a Linux-based architecture, it is capable of booting several distinct operating systems beyond its original firmware.
An in the N9 community refers to builds that: nokia n9 custom rom exclusive
The N9's "Fabula" design—a seamless polycarbonate unibody with a curved Gorilla Glass display—was so iconic that it was later reused for the Lumia series. The hardware's buttonless, swipe-heavy interface was perfectly suited for custom Linux builds, making it one of the few devices where a user could feel like they truly "owned" the software stack from the kernel up. Because the N9 runs on a Linux-based architecture,