To use your phone as a Mobile presence sensor, you must first enable SmartThings to see your location.
Set up a routine to enable arming by going to Automations in the ST app.
- Tap the + in the upper right corner to Create a Routine
- Under the IF, add a Member Location as a trigger. Select the conditions that all members have left Home. Tap Done
- Under the Then tap, add a routine
- Select Change security mode.
- Tap Done.
- Tap Save.