Google has begun the roll out of the Android 5.1.1 update for Nexus 4, Nexus 5 and Nexus 9 LTE devices. The update is now available over-the-air (OTA) and will reach your Nexus device sometime over the next few days.
To remind you, Android 5.1.1 is minor bug-fixing update, which doesn’t include any new features.
In related news, the company has also published the upgraded factory images of these devices as well the cellular versions of the Nexus 7 tablets on its developer website. The OTA update hasn’t been released for the Nexus 7 (both) cellular variants, but it should be arriving soon.
OTA update ZIP files