Wireless Emergency Alerts, also called the Commercial Mobile Alert System (CMAS), is a new national public safety system that allows customers with CMAS-capable mobile devices to receive geographically-targeted notifications of emergency situations, such as a weather event, a hazardous material spill or a missing child, in their area.
There are three types of Wireless Emergency Alerts:
- Imminent Threat (categorized as Extreme & Severe)
- AMBER Alert
Customers with CMAS-capable mobile devices will automatically receive these alerts and may choose to turn off all alerts except Presidential alerts.
CMAS uses a unique signal and vibration to attract attention; however, Wireless Emergency Alerts will not preempt calls or data sessions in progress.
The 90-character text-like alerts will be broadcast simultaneously to CMAS-capable mobile devices, similar to the way emergency alerts are broadcast over radio and television today. With Wireless Emergency Alerts, we can now reach our customers wherever they are.
Read more about How Wireless Emergency Alerts work.