Arrow can send a delivery driver text messages when certain actions occur.
EMPLOYEE CONFIGURATION
SMS MESSAGES
There are delivery driver SMS messages you can enable in Back Office>Configuration>SMS messages.
CUSTOM SMS MESSAGES
In Back Office>Configuration>Misc. Settings there is a Quick SMS tab that will allow you to create custom messages. You can add or delete messages with the buttons on the right.
On the driver out screen you will see the button to send text message. Click Send Text Message.
Select Send Text Message