Under Account Information, next to the phone number option, click Add Phone.
Enter the cell phone number you'd like to receive texts to and click Save.
Enter the verification code sent to your cell phone, and click Save.
Under the Account heading, click the Communication Preferences tab.
Within each organization you are affiliated with, on the right side of the page, check the box next to your number to receive texts. Your selection saves automatically.
Notifications will not show the received message but will alert users of messages in their account.