Don't have access to your phone to arm Scout? Use another phone and text "I forgot to turn on the alarm" to IFTTT and arm your Scout.
If
New SMS received matches search
This Trigger fires every time you receive an SMS on your Android device that matches a search you specify.
Then
Start arming a mode
This Action will arm a mode at your location of choice (home, vacation home, etc).
Discover more time saving integrations for Android SMS and Scout Alarm