Download NPC91K Second Developer Preview for Nexus devices


Its been a month since Google rolled out it’s first Android N Developer preview image for Nexus devices and now the second Developer preview is here. The Android N second Developer Preview carries build number NPC91K and is available for the users who have already registered for Android Beta Program. In this guide we are going to show you how to install NPC91K factory image on Nexus 5x, Nexus 6, 6P, Nexus 9 and Pixel C.

If you are the users of any one of the above mentioned devices then you will be receiving the OTA notification any time soon but if you want to flash the firmware without waiting for the OTA update just follow our step by step guide below. You can also give a check for the OTA notification whether it’s already about to knock at your device, go to

Settings >> About device >> System update and check for the software updates.

How to manually update NPC91K on Nexus 5X, Nexus 6,6P, Nexus 9 and Pixel C

Before you Begin:

  • Please ensure your phone battery should be charged at minimum 80%
  • Enable USB Debugging, go to Settings >> Developer Options >> USB debugging
  • Download USB drivers for Nexus.
  • Your device bootloader should be unlock or Follow our guide (You can follow this guide as the bootloader unlock process is almost same for every Nexus device)
  • Download adb-and fastboot

Download NPC91K factory image for Nexus 5x, Nexus 6, 6P, Nexus 9 and Pixel C from the link provided below.

Download NPC91K factory image for Pixel C

Download NPC91K factory image for Nexus 5X

Download NPC91K factory image for Nexus 6

Download NPC91K factory image for Nexus 6P

Download NPC91K factory image for Nexus 9 / Nexus 9G

Once done with the pre-requisite files and tools needed in the installation process then just go ahead and follow the below simple steps. The process is very simple all you have to do is just follow the below simple steps to install NPC91K factory image on Nexus devices.

  • Extract the NPC91K factory image file you have downloaded earlier and copy all the files to adb-fastboot folder’s directory.
  • Turn of your device & reboot into bootloader mode, to do so press and hold the Volume down + Power button at the same time until you see a screen with fastboot written on the top.
  • Once your device reboots into bootloader mode, now open any one of the extracted firmware folder.
  • Now connect your device to PC during fastboot and run the “flash-all script” file present in the same folder.
  • The installation process will take some and when it is completed you will be notified.

That’ it! You have successfully updated Nexus 5x, Nexus 6, 6P, Nexus 9 and Pixel C on NPC91K Android N firmware. If you have any query feel free to contact us by posting your queries in the below provided comment section. Follow us on Facebook/Twitter/Google+ for future update.

A Software Engineer who loves to hang around latest gadgets and writes his own experiences to get the best possible and accurate information.
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