I can't post links yet...but google "tmobile doc 3031"
The service was designed so that it will not be delayed or bogged down by the kind of high call-traffic scenarios that often happen in an emergency. There will be three kinds of messages that go out over the service:
- Messages from the President
- Imminent threats to safety of life
- Amber Alerts
Note: Participating carriers may allow subscribers to opt out of all except those from the President.
Only certain T-Mobile devices are currently CMAS-enabled. The current list of phones can be found
When CMAS alerts are received on your CMAS-enabled device, you will be notified in the following ways:
- The device will transmit a unique tone
- The device will vibrate with a unique cadence
- The device will display the alert without user interaction, consistent with how the device typically displays incoming phone calls and SMS messages.