You need to configure the SOS emergency numbers to make use of this functionality.
SOS Number Settings:
Desde “Ajustes”/”SOS”:
- Set the function status: ""Activated"" or ""Deactivated"".
- Configura el estado SMS: ""Activated"" or ""Deactivated"".
- Set the emergency numbers in ""Number List"" (1 to 5).
- Enter the help message that will be sent to the SOS numbers: “Text”: By default, ""Help!"".
Using the SOS function:
During an emergency, press and hold the SOS key for a few seconds. The The terminal will sound an alert and send the SOS messages to the previously stored numbers. The call cycle will then start. The telephone will activate the speaker and call the SOS
numbers in consecutive order, if there is no answer, it will jump to the next number until one of them responds, this cycle will be repeated 3 times.
*Warnig* If a number in the list has voicemail, the cycle will end.
Cancel the SOS function:
If you have activated the SOS function by mistake, you can stop making calls pressing the key 
.