While you can wait for the OTA update, Google has released Android 6.0 factory images, allowing us to flash the software manually instead. Written guide: .\rbr\rbrThis video will show you the correct way to manually update to Android 6.0 Marshmallow using the official OTA update zip. Subscribe for more!\rbr\rbrGoogle Nexus 5 Can Be Upgraded To Android 6.0 Marshmallow . now available via OTA update and the installation can take up to 45 minutes.\rbr\rbrSpeed and performance test between Nexus 6 and 5 on latest Android 6.0 Marshmallow build. Nexus 6 is cheaper nowadays on Amazon US .