Every morning my phone display timeout has reverted back to 30 second timeout and I have to go into settings/display/screen timeout and reset to 3 minutes. Every day. This just started after last update. How can I set the screen timeout permanently to something longer than 30 seconds?
Have you tried clearing the cache partition of the phone?
Turn off the device.
Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
When the Android logo displays, release all three keys.
An ‘Installing system update’ message will show for 30 – 60 seconds before the Android system recovery menu options appear.
Press the Volume down key several times to highlight wipe cache partition.
Press Power key to select.
Press the Volume down key to highlight yes, them and press the Power key to select.
When the wipe cache partition is complete, Reboot system now is highlighted.
Press the Power key to restart the device.