Opt-in to SMS is completely optional and there is no fee associated with this service. You may opt-out at any time by logging into your account and unchecking the boxes for text messages (see images below). Alternatively, you may contact the library for help by emailing library@dmu.edu.
Once you are in your account, look at the menu on the left hand side. Under tools, click on "Change User Information".
Next, you will need to add your mobile phone number to your user information as well as check your text notification preferences. Hit submit and you are all set!