The Dashboard's Address Book is a useful place to store and manage your contact list.

Adding contacts to the Address Book

When logged into the Dashboard, select Address Book.
You are able to Upload a List of contacts from a file, or Add Recipients individually into the Address Book.

Sending Messages to Address Book contacts

You can send a message to one single Address Book contact by clicking on the contact and clicking the New Message button.

You can send a broadcast to a group of contacts via the Send SMS launcher.
In Step 2, select Method 2 (choose from Address Book).

Unsubscribing Address Book contacts

It is imperative to include an opt-out/unsubscribe function in any broadcast message. A popular option is to include "Reply STOP to unsubscribe" at the end of messages.

You can keep track of reply messages via the SMS Received tool.
After sending your broadcast, periodically check the SMS Received menu for any replies received. Should you see a STOP or equivalent reply, check the box next to these messages and click the Remove from Address Book button.