Fact of the matter is you can do that. However, consider that your phone or tablet may be turned off or set to “Do Not Disturb” mode. Or you may be out of range of a cell site. Or you may be in an important meeting. Or in an airplane. Or perhaps you are at a theatre or play and your device is set to silent mode. And if you happen to be away from your home police jurisdiction calling 911 may not be able to help you, and if they can help you the call to the proper police responders will be significantly delayed – likely delayed so as to be of little assistance when they do arrive. Damar Security Systems monitoring centres are staffed 24/7/365 and we have all the confidential direct telephone numbers to all of the responding police and fire authorities. Consider that your heme is one of the largest purchases you will ever make! Is it not worth a few dollars every month to ensure prompt response?