I finally updated my N7 (2013) from 4.4.4 to 5.1.1 in hopes to get 6.0 The system update says there is still a small (13.8 mb) update to install (already downloaded and verified), so I click "install and reboot". Machine counts down, but never reboots. I've manually rebooted 2x. Same thing. I've wiped the cache partition 2x. Same thing. Build number is LMY481. Wifi only.