Emergency alerts will not end or terminate a voice call or data session in progress.
If you are on a voice-call when the emergency alert is received, you may be made aware of the alert by a notification tone (similar to call waiting).
If you are on a data session, such as surfing the Internet or using an application such as Facebook or Netflix on your device, your data session will continue but it may be briefly interrupted by the emergency alert appearing on your wireless device screen.