Google posted an Android 5.1.1 Lollipop factory image for HTC Nexus 9 (Wi-Fi). The firmware sports version number LMY47X.
The LTE-capable Nexus 9 is yet to receive the Android 5.1.1 treatment. The version with cellular connectivity is still stuck on Android 5.0.2 Lollipop for the time being.
If you are an owner of Wi-Fi-only Nexus 9, head over to the settings menu to check if the new firmware is available over-thee air. In case it hasn’t arrived yet and you don’t like to wait, hit the source link to download the factory image.
Source | Via