With unlocked bootloader, update nexus from 5.0
Download new factory image and extract all contents
Extract all contents of image…zip file just extracted into a folder (images)
Boot to bootloader (adb reboot bootloader)
To update system
– fastboot flash bootloader bootloader…img
(reboot to bootloader)
– fastboot flash radio radio…img
(reboot to bootloader)
cd to images folder containing files of image.zip
– fastboot flash system system.img
update bootloader may be needed if booting process failed.
Don’t flash userdata/no need to flash userdata partition. fastboot flash will erase the partition! It is the same as using -w switch (see below)
To update boot, recovery, system partition without deletion of user data:
– fastboot update image-…zip (NO -w switch!!)
* refer to flash-all.sh/flash-base.sh script for more info
IMPORTANT!
fastboot with -w switch is to ERASE ALL userdata and cache
DO NOT use -w switch if to retain user data!!