OS Recovery Update
Connect the USB cable from your PC to the device and enable USB mass storage mode on the device. On your PC you should see an internal and external USB mass storage drive (SD card) appears in the File Explore and copy the recovery update zip file to any storage.
Press and hold on the device the Power button, Scan/Action button and Vol+ until the screen is turned OFF
Release the Power and Scan/Action buttons and continue to hold Vol+ button
The device should enter to Recovery update mode Release Vol+.
Click on Vol+ or Vol to navigate and select appropriated storage
Click on on Scan/Action button to select the option
Click on Vol+ or Vol to navigate to the recovery update zip file
Click on on Scan/Action button to select the recovery update zip file
Device will automatically reboot and will be ready to use.