How to Firmware Restore your device.
1. MAKE SURE YOU HAVE ALL YOUR ADB DRIVERS INSTALLED!!
2. Download the amazon frimware and keep it where you can flash it.
3. Boot into recovery (Volume Down + Power at the same time)
4. Select “adb sideload” or whatever it says using your volume keys and press the power to select
5. Now adb sideload <frimware>.bin
6. Its probably gonna take 5- 10 minutes so be patient and then once the recovery options come up make sure you wipe every thing and cache as well
7. Reboot gonna take another few minutes BE PATIENT!!
8. Now your back to your stock frimware. video Tutorial on these steps below.