You can send emergency messages to recipients in urgent situations by pressing the power button 3 times consecutively.
Sending emergency messages on Samsung Galaxy S8 Plus is as follows:
Step 1: Go to 'Settings' and select 'Advanced features'.

Select 'Advanced features'.
Step 2: Choose 'Send SOS messages'.

Choose 'Send SOS messages'.
Step 3: Select 'Add'.

Select 'Add'.
Step 4: Choose a contact from your address book or create a new one.

Choose a contact from your address book or create a new one.
Step 5: Complete the setup.

Setup completed.
That concludes the setup process. Wishing you all success.
