[Q] My Nexus is stuck in 4.1.2 stock topic

Hey All,

Just got a friends Nexus and it was last used with 4.1.2 jellybean, I tried updating via OTA in settings but there is no update there and says my phone is up to date. I'd like at least 4.2.2 although 4.3 would do well :)

I've tried using methods of clearing data from the Google framework but that did not work.
Also I have only just installed everything i want on it as i had to factory reset.

Any help?

Thanks in advance :)