Samsung Gear S2 classic User Manual page 144

Samsung Gear App
Send SOS messages
In an emergency situation, quickly press the Gear's Home key three times. The device sends messages to your primary contacts.
The messages include your location information. You can also send sound recordings along with the message to the recipients.
1 On the Apps screen of the smartphone, tap Samsung gear > Settings > Send SOS messages, and then tap the switch to
activate it.
2 Follow the prompts to add primary contacts.
Some smartphones do not support this feature.
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