Many of your security systems utilize cell technology for communications. Now, if we can't get a good signal on one carrier, we can easily switch to another to get the best signal in your home or business. In addition, we fallback (backup) to another carrier in the event we lose communication or there is an issue with a tower. Currently, we can have AT&T for primary communications with T-Mobile as a fallback or Sprint for primary communications with Verizon as a fallback. So no matter where you are located or what mother nature gives us, we have reliable and dependable service.