Remove Android Oreo and Get Back to Android Nougat

Don't like Android Oreo? This video is a step by step instructions guide on how to remove Google Android Oreo and get back to Android Nougat. Pixel and Nexus devices ONLY.

NOTE: If the reason you want to rollback Android Oreo is because you did an upgrade from Nougat to Oreo and things aren't working as expected. You "may" want to reset the phone first, before rolling back. Your issues maybe related to the upgrade and no exactly with Android Oreo.

✅ Links from the video:
1) Google USB Driver:
 https://developer.android.com/studio/run/win-usb.html
2) Android Platform Tools: 
 https://developer.android.com/studio/releases/platform-tools.html
3) Factory Image: 
 https://developers.google.com/android/images

✅ Set device for development:
 a. Settings | System | About phone | tab on Build number 7 times or until your notify with "You are now a Developer".
 b. Settings | System | Developer options | OEM unlocking & USB debugging (Enable)
  
✅ Commands from the video:
 a. Connect phone to PC
 b. Enter fastboot: "adb reboot bootloader"
  Tab "OK" on "Allow USB debugging?"
 c. Check connection: "fastboot devices"

✅ To unlock the device: 
 a. Type "fastboot flashing unlock" (try "fastboot oem unlock" if it doesn't work)
  This will erase the device

✅ To Flash the factory image:
 a. Go to the directory were you move the factory image (platform-tools) and execute: flash-all
  
✅ For security reasons you need to re-lock the device
 a. Set device for development: 
  Settings | System | About phone | tab on Build number 7 times or until your notify with "You are now a Developer".
  Settings | System | Developer options | USB debugging (Enable)
 b. Start the device in fastboot mode: adb reboot bootloader
 b. Check connection: fastboot devices
 c. Lock bootloader: fastboot flashing lock (try "fastboot oem lock" if it doesn't work)

 If you bricked your device go to this page and use the corresponding key combination to place your device in Bootloader mode again and retry flash-all.

https://source.android.com/source/running#booting-into-fastboot-mode

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