Karnak

The Fire HD 8 2018 (codenamed Karnak) is an Android-based tablet computer produced by Amazon. Released in October 2017, this is a mid-range tablet from Amazon running on a customised Android fork called FireOS.

An overview of the device can be found here on this Wikipedia article.

Tech specs

• Display: 8-inch capacitive touchscreen with TN LCD display
• Kernel version: Linux Kernel 3.18.20 based on ALPS.W10.24.p0
• Resolution: 1024x600
• Operating system: Fire OS 6 (based on Android 7.1.2 "Nougat")
• Processor: Quad-core, 1.3 GHz (MediaTek MT8163)
• Memory: 1.5GB RAM
• Storage: 16GB; ~9GB available for /sdcard partition
• Micro SD card slot: Yes, expandable up to 256GB
• Camera - rear: 2MP
• Camera - front: 2MP
• Audio: 3.5mm stereo jack with microphone; bottom-mounted Dual speaker
• Wireless: Wi-Fi 802.11 b/g/n AC
• Bluetooth: Bluetooth 4.1
• Battery type: Rechargeable lithium-ion
• Battery life: 7+ hours; results will vary based on usage and settings
• Port: Micro USB
• Sensor(s): Accelerometer, light sensor, Hall sensor

Resources

OTA update ZIPs

The following files are incremental updates used to update an existing system to the latest build.

Latest version: "NS6315_user_2504_0003658074244"

Custom recovery images

• (READ THESE INSTRUCTIONS)

Sideloading APKs

A guide for enabling Unknown Sources can be found here.

There are two ways to install APKs, one through downloading stuff off the Browser, and the more advanced method being ADB.

For the latter, you'll need to download the latest ADB and Fastboot binaries, install the necessary drivers, and enable USB debugging. You can access developer options by lookign for the Developer options menu item and tap it, then tick USB debugging to enable ADB mode.

• 
  Open Settings.
• 
  Go to Device options.
• 
  Tap on About Fire Tablet, then tap serial number 8 times.
• 
  Go back and tap on Developer Options
• 
  Turn Developer settings on and enable USB debugging

Now plug your Fire HD 8 to a computer, then using a command prompt, run the following command:

adb devices

You should get an authorisation screen, and make sure to tick the checkbox so it would be authorised the next time you plug your device in. The command prompt should also display something along the lines of this:

1111111111111111 device

Once that's done, you may now install APKs using this method. To do so, key in the following:

adb install foobar.apk

where foobar.apk could be any APK file you have lying around. If done correctly, it should show up on the application menu.

Custom ROMs

Lineage 16.0 For Karnak (google/lineage_karnak/karnak:9/PQ3A.190801.002/kai03160059:userdebug/test-keys):

• AFH