Tips & Tutorials

Update Nexus 9 to Android N NPC91K Developer Preview 2 Factory Image

We have compiled a step-by-step tutorial for installing newest Android N NPC91K Developer Preview 2 factory image on your HTC Nexus 9. Android N is the latest iteration of the Operating System kick started back in 2007. A lot has changed and improved, Android N brings in functioanlity that customers have requested while still leading the innovation in mobile segment. You can experience the pre-release Developer Preview straight on your Nexus 9 without any hassle. With Android N, there is a beta program which you can register on and get the latest updates straight on your tablet. However, in this guide we will focus solely on installing Android N NPC91K Developer Preview 2 manually. What this does is allow you to experience Android N without any registration or added hassle. The exact Android N Developer Preview 2 build is NPC91K for Nexus 9. You can manually update Nexus 9 to Android N NPC91K factory image from the tutorial below — and also root Nexus 9 on this firmware release. The only catch is that if this will be your first time playing around with a factory image, you might have to unlock your bootloader first before continuing and installing a system image on a device removes all data from the device, so you should back up your data first.

If this is your very first time installing / flashing a factory image, we understand you would want to make sure your installation process go as smooth as possible. So before we actually jump to the installation process of Android N NPC91K image, let’s take a look below at how to backup all your data. When installing this Android N Developer Preview 2 factory image, your entire data will be wiped clean — like a brand new phone. As a Nexus 9 user, you have several options to choose from depending on how you want to store your data. These are the some of the tips given below that we want you to keep in mind and then proceed.


Disclaimer: All the custom ROMs and firmware, official software updates, tools, mods or anything mentioned in the tutorial belong to their respective owners/developers. We ( or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉

Nexus 9 Android N NPC91K Factory Image Details:

Android N Developer Preview 2 is now available for the Nexus 5X, Nexus 9, Nexus 6, and Nexus 9 phones and tablets. These are the major changes in Developer Preview 2 release of Android N, as per Google:

The latest Android N Developer Preview 2 NPC91K is the next upcoming major firmware release by Google. It brings some new features like multi-window mode, an enhanced doze mode, a revamped Settings screen and a quick toggle in the notifications panel. Other changes include improved notifications, improved multitasking and app switching, dark mode etc.

Meanwhile, you should also check out the following articles:

If you plan on rooting this phone or are still confused for why to root Nexus 9, read: Benefits of Rooting Your Android Device.

HTC Nexus 9 USB Drivers

You will need to connect your Android phone with the computer. For that, please make sure you have installed the USB drivers for HTC Nexus 9 properly. If not, you can download the latest official drivers from our Android USB Drivers section here:

Download HTC Nexus 9 USB drivers!

Backup and Other Important Tips

Done with the USB drivers? Perfect. The tutorial is on the next page, but first, please take a look at the following tips and important points you need to take care of. These are important, as we don’t want anyone losing their personal data or apps:

Always backup your important data that you might need after you install a new custom ROM, an official software update or anything else. Make a backup for just in case, you never know when anything might go wrong. See below for some tips on how to backup data:

If you already have a custom recovery (ClockworkMod, TWRP etc.) installed on your phone, we strongly recommend a backup using that as it creates a complete image of your existing phone set up.

A few more optional tips that you should remember:

1. Having problems connecting your Android phone to the computer? You need to enable USB debugging mode. See here: How to Enable USB Debugging — for Gingerbread, Ice Cream Sandwich, Jelly Bean, KitKat, Lollipop and Developer Preview 2.

2. Make sure your Android device is charged up to 80-85% battery level. This might help you: How to Check Battery Percentage. Why? Because, if your phone goes off suddenly while installing a custom ROM, flashing an official firmware update or installing mods etc. — your phone might get bricked or go dead permanently. No one wants that, right?

4. Most of the tutorials and how-to guides on Team Android are for factory unlocked Android phones and tablets. We recommend not to try our guides if your phone is locked to a carrier, unless we have specified the carrier name or device model.

If you find the above tips useful and they were helpful to you, please consider giving us a +1 or LIKE to thank us!

All set and ready? Good. You can now continue reading on the next page and update your Nexus 9 to Android N factory image.

About the author

Taimur Akmal

Devoted writer, enjoys developing code. Appreciates excellent food, exceptional coffee and great company. He is also into sublime design and nicely built cars.

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