It seems a small group of T-Mobile Nexus 6 users are now receiving Google’s Android 5.1.1 Lollipop update via over the air method.
The update brings the Wi-Fi calling feature to the users, lets them able to make or receive calls over a Wi-Fi network; a new Device Anti-Theft feature as well as bring build number from LMY47M to LYZ28E.
If you have not received this update on your device yet, please be patient and it will arrive to your phone soon. Following the details, this update is just rolling out for a small group of users, and could be available to all of us in short time.
You have already updated ? Tell us how do you feel about the new feature: Wi-Fi calling ?
— Des (@askdes) May 22, 2015