The only problem we encountered was the caller id on our cell phones. It simply said the call was from out of state. I did not take the call the first time thinking it was scam..not knowing anyone from that state. We have now put that number into our contacts list under Alert 1 so if we get another call we will know who is calling. I recommend letting your customers know the telephone number associated with the alert 1 notification system so that they can put it in contacts. If there is some way the caller ID could come up as Alert 1 instead of the phone number I advise that be done.