This is where the "Custom ROM" magic happens. In the N9 world, this usually means installing or Nolo (No-Load) to run other OSs.
Searching for a " Go to product viewer dialog for this item. nokia n9 custom rom exclusive
: Because it was the only flagship device released with MeeGo before Nokia moved to Windows Phone, the developer community for it is much smaller than for more widely adopted phones. This is where the "Custom ROM" magic happens
Before you touch the device, understand these risks: : Because it was the only flagship device
"N9 Reborn — Introducing an exclusive custom ROM that modernizes MeeGo Harmattan for today’s web and app needs. Featuring a 3.4 kernel, WebKit2 browser, improved battery life, optional Android app support, and a theme engine — this build is for enthusiasts who want to keep the iconic N9 alive. Flashing instructions and source code available on our repo."
: Go to Settings > Security > Developer Mode to enable the terminal and installation of untrusted software.