Google just recently began rolling out Android
5.1 Lollipop within the last few weeks, but there
may be another software version already on its
way sometime soon. The next version is Android
5.1.1, and it was recently found running on the
Nexus 9 and Wi-fi Nexus 7 (2013) model on
Google’s Android Audio Latency information
page. The Nexus 9 is running build
number LMY47S and the Wi-fi Nexus 7 (2013) is
shown running build number LMY47W. We’ve
attached a screenshot below so you can see for
yourself.
We can’t be sure that an official rollout will
happen within the next few days (or weeks for
that matter), but since Google is openly flaunting
the new version on its own website, it’s tough to
imagine we’re too far away from 5.1.1 rolling out
sometime soon. There’s been no leaks or rumors
about what exactly 5.1.1 will bring, but we’re
sure it has something to do with bug fixes.
The Wi-Fi Nexus 7 and Nexus 9 were among the
last of the Nexus devices to receive the update
to Android 5.1. The Nexus 7 just received its
update a few days ago , and the Nexus 9 is still
stuck on Android 5.0 . We’re hoping a rollout
happens sometime soon, because the Nexus 9
needs a boatload of bug fixes.

http://www.androidauthority.com/android-5-1-1-references-googles-site-601945/

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