If you own a device still running Android 5.1 or earlier, here is everything you need to know about the , where to download it, and how to install it.
– For Nexus 5 owners in particular, this update resolved camera-related issues that had affected some users following the original Android 5.1 update.
Android 5.1.1 wasn't just about bug fixes; it brought several "quality of life" improvements to the Material Design experience:
1 GB (2 GB recommended for optimal performance)
Boot the Nexus device into Fastboot mode by holding the buttons simultaneously while powered off. Connect the device to the PC via a USB cable.
To download official, un-modified Android 5.1.1 firmware, you must source the files directly from your specific device manufacturer. 1. Google Nexus Devices