Alertmobile : Avoid having alertmobile go into standby mode on samsung devices

In Settings, go to Battery and Background usage limits. Click on Apps never put on auto standby and add AlertMobile.

 Now, AlertMobile should always run, even if the phone is locked and after 2 minutes. You can verify it on the navigation button  « Overview » of the phone, click on « X active in the background », if AlertMobile is displayed, you should always receive the notification.