How do I update my O/S?

[WPCentral Question]

I have a Nokia 920 on vodaphone, updated to Cyan running O/S 8.10.12393.890 but need O/S 8.10.14141.167 to run Cortana. I have checked updates and it says my phone is updated. How do I get the newer O/S?

 

[Pravat]

Wait for official denim update or get developers preview.