Select Settings > Messages.

Listen Interval

Sets the frequency at which the device listens for new messages.

Ring Until Read

Sets the device to ring until you read a new message. This feature is helpful if you are in a noisy environment.

Adaptive Mail Check

When this setting is enabled, the device listens more frequently for a reply to a sent message for ten minutes. If the recipient replies quickly, you can receive the reply before the next scheduled listen interval. This setting is only available for professional customers.