How to Solve 'unauthorized screen' error in S9 which appears after reboot?

Last Update Date : Apr 16. 2018

If you enabled “OEM unlock” in Developer options, device may be not rebooted properly. As OEM unlock setting is a function that related with device’s security, if you activated “OEM unlock” that means  device protection functions and sensitive apps, including Knox and Samsung Pay will not work .
 
Therefore it should be deactivated. Once below screen is shown, please tap the RESET and check whether you activated “OEM unlock” option or not in Settings > Developer options. 

NOTE: When you tap the “RESET” button, your all data will be erased and initialized

How to Solve 'unauthorized screen' error in S9 which appears after reboot?

After reset is done, you have to check status of ‘OEM unlock’. 

1 Go to Apps screen and tap Settings.
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
2 Tap About phone and tap Software information.
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
3 Tap Build number 7 times to enable a developer mode.
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
4 Go to Apps screen and tap Settings.
5 Tap Developer options.
How to Solve 'unauthorized screen' error in S9 which appears after reboot?
6 Check OEM unlock option. If this option is deactivated, keep current status.

But if this option is activated, you have to turn it off

How to Solve 'unauthorized screen' error in S9 which appears after reboot?

After deactivating ‘OEM unlock’ option, device will be restarted again. And then press ‘RESET’ button again

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