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Flash Essential
2. Flash to your PH-1
Once you've downloaded the system image, follow the instructions below to flash the image onto your Essential Phone.
Flashing Instructions
1. Set up your computer for flashing
Download the fastboot tool from the Android SDK Platform-Tools package
Add it to your path so the flash scripts can find it
Connect your Essential phone to your computer with a USB cable
2. Enable unlocking
Before you can flash a new image, ensure Developer options are enabled and OEM unlocking is turned on. To do this:
Tap Settings, then tap System > About phone
Scroll to the bottom of the page, then tap Build number multiple times until you see the pop-up message “You are now a developer” (It usually takes seven taps)
Go back one screen to System, then tap Developer options
Find the option: OEM Unlocking and turn it on
Find the option: USB Debugging and turn it on
3. Fastboot mode
Put your Essential Phone into fastboot mode by doing either of the following:
Use the ADB tool packaged above to run the command: adb reboot bootloader
Reboot your phone while holding the Volume-down button
4. Unlock your bootloader
Installing the factory image will erase all information from your device. So remember to backup your phone before continuing.
Run the command: fastboot flashing unlock
Press the Volume-down button to navigate to the YES option, then press the Power button to confirm. Your Essential Phone will reboot.
While your Essential Phone is rebooting, hold the Volume-Down button to return to Fastboot mode.
Run the command: fastboot flashing unlock_critical
Press the Volume-Down button to navigate to the YES option, then press the Power button to confirm. Your Essential Phone will reboot.
While your Essential Phone is rebooting, hold the Volume-Down button to return to Fastboot mode.
5. Flash your factory image
Download the factory image to your computer
Unzip the downloaded file
Go to where you unzipped the images
For Linux / Mac OS X - Run the command: flashall.sh
For Windows - Run the command: flashall.bat
6. Relock your bootloader
After flashing, it’s a good idea to relock your bootloader for security.
Go back to fastboot mode
Run the command: fastboot flashing lock
Go back to fastboot mode
Run the command: fastboot flashing lock_critical
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