Google released Android 7.0 Nougat on August 22nd, but since then, only Nexus ... be able to enjoy a beta version of Android 7.1 Nougat on their devices. ... first feature as a beta, it will not be available to all users of these gadgets.
Read more: Google Nexus 6P, Nexus 5X and Pixel C – How to Get Android 7.1 Nougat Update
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