For some reason, Google has decided that the Nexus 6should be downgraded to a previous OS version after it recently brought the phone to Android 7.1.1 Nougat.
There’s a huge thread up on reddit where Nexus 6 owners say Google has pushed a new Android 7.0 Nougat update on their phones. As some of you probably know, Google had to delay the release of Android 7.1.1 Nougat for the Nexus 6.
Unfortunately, when Android 7.1.1 arrived on the Nexus 6, it also brought some bugs, which have been consequently addressed in the recent March security patch. However, the latest update broke another important feature on the Nexus 6, Android Pay support.
Now it looks like Google has given up and decided to roll back Nexus 6 phones to Android 7.0 Nougat. The reason is explained by a Google community manager: