How to use Emergency Mode in Samsung Galaxy S8+?

Emergency mode conserves your device’s remaining power when you are in an emergency situation. Power-hungry apps and functions are disabled but you can still send messages, use contacts, and make emergency calls.
 

Press Power key → Emergency mode → AGREE → ENABLE  

Pictorial representation of the above settings are as follows :

1. Press and hold the Power Key.

2. Touch Emergency mode.

3. Review the Terms and conditions. If you agree, select I have read and agree to all the terms and conditions above and then touch AGREE.

4. Review the setting changes and then touch ENABLE.

CLICK HERE to know how to add or remove a Home screen in Samsung Galaxy S8+ ( SM-G955 ).