A new Android 5.1 build adds updated radio firmware and other under-the-hood changes.
Just a week after Android 5.1 first became available for the Nexus 6, Google has pushed out an updated factory image for that device. It's still Android 5.1, but with an updated build number — LMY47E, up from the older LMY47D. So what does that extra letter get you?
Well, we're seeing updated radio firmware — the software that controls stuff like cellular signals, Wifi and Bluetooth — alongside some minor changes to some files in the /system partition. (We're seeing changes in binary files relating to the text-to-speech engine, NFC and sensors.) So on the surface this would appear a relatively minor update. Nevertheless, if you're eager to update, you can grab the factory image from the source link below.
Download: Nexus factory images