I got the SMS, but not the Page

This is a result of the Alerting Policy functioning as designed:

If you are in a poor coverage area, or experience a drop in the data service for your mobile, then the Push notification fails (the page does not reach the app); so as a backup you will be sent an SMS alert (text mssg) to indicate you've missed a Page. 

Once in a better coverage area, the SmartPager app will continue to sync and pull in all of the Pages you missed. 

 ***TIP: try turning Off the WIFI on your mobile device.