How to Upgrade device's Firmware/ROM Manually
Method 1:
Open the ‘System Update’ app from the Tool’s folder on the screen.
2. Click 'Check the Update'
3. Make sure the ‘Speed Not limited’ can be accepted by your network. Default is ‘20K/s’ which is not too fast.
You can click the speed button to change the download speed. Unless the group’s download speed has been set a maximum value through your MDM account.
4, After updating, please click 'Reboot the Update'
Method 2:
1, Go to Settings->System->About Device: Click the Device’s Icon and its description. (Title row)
For example:
2, Repeat Method 1’s steps: 2-4.