How to solve unauthorized screen error in Galaxy S9 which appears after reboot?

Last Update Date : May 30. 2018

If you enabled “OEM unlock” (OEM stands for Original equipment manufacturer) 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 the unauthorized screen notification is shown, please tap the RESET and check whether if “OEM unlock” is activated on the Developer options. 

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

Unauthorized screen

To check the status of OEM Unlock, follow these steps:

1 Go to Apps screen and tap Settings.
Tap settings
2 Tap About phone and tap Software information.
About phone
Software Information
3 Tap Build number 7 times to enable a developer mode.
Tap Build Number 7 times
Developer Mode
4 Go back to Settings and tap Developer options
Tap Developer options
5 Developer options Check the status for OEM unlock. Keep the status, if it is deactivated. If it is activated, turn if off. After deactivating OEM Unlock function, the device will restart and then press the RESET button again

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