How to put SAMSUNG S4 on safe mode…
https://www.hardreset.info/devices/samsung/samsung-s4/safe-mode/
How to Open Safe Mode on SAMSUNG S4? Turn off the device by holding the Power button until the option to Power Off appears on the screen. Tap Power off. Press and hold the Power and the Volume Down buttons at the same time, to turn the device on. When the Samsung logo appears, release the Power button and keep holding the Volume Down button. If done correctly, "Safe mode" will display on the bottom left corner of the screen. Firstly, use the Power key to completely disable the SAMSUNG S4. Then, hold down the Power button. When SAMSUNG logo pops up, release the Power and start tapping on the Menu key.
Turn off the device by holding the Power button until the option to Power Off appears on the screen. Tap Power off.
Press and hold the Power and the Volume Down buttons at the same time, to turn the device on.
When the Samsung logo appears, release the Power button and keep holding the Volume Down button.
If done correctly, "Safe mode" will display on the bottom left corner of the screen.
Firstly, use the Power key to completely disable the SAMSUNG S4.
Then, hold down the Power button.
When SAMSUNG logo pops up, release the Power and start tapping on the Menu key.
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