I'm not sure I understand. The cellular backup on the alarm that's used to call the monitoring center only works for 72 hours after install? Or the arming & disarming the alarm via the app on your phone only works for 72 hours after install, and after that it all has to be done on the keypad?
Hey @Jim_in_nh! There is no applied time frame limitation to the cellular back up feature. Cellular back up will work as long as there is power and the environment, of course, allows for sufficient cellular signal transmission. Keep in mind, it is only intended for backup, and in backup scenarios (power outage) the backup battery will also be used. The backup battery can last up to 24 hours depending on usage.
Check out our help center article about these backup features to learn more. I hope this helps!