If your notification tones are not playing when you receive app notifications, such as the alarm siren when your alarm system has been triggered, please follow the following steps to ensure that your notification settings are correct.
For android devices go to your device's app settings. This will be found in 'Settings' under 'Apps' or 'Manage Apps'
Search for and select ArmME
Open the notification setting
Enable notifications, and enable the notification setting to play sounds (and vibrations).
Look for 'Alarm' and 'General' notification settings.
Ensure both are enabled to play sound. On some devices, you may have a setting to ignore 'Silent' or 'Do Not Disturb' mode. Enable this setting to make sure notification sounds are played when your device is put on 'Silent'/'Do Not Disturb'
* These steps required may differ slightly across different smartphone brands.