Mobile Reminders keep you up to date on your latest account activity. Avoid fees and track your spending with payment, purchase limit and other reminders sent right to your mobile device. Carrier charges may apply.
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to get started. 
You may select which mobile reminders that you would like to receive from the My Profile page within Discover.com. Click Here to register or login to choose the reminders you want to receive. You will receive a text notification to confirm your enrollment. You must reply to the confirmation notification to complete your enrollment.
You can elect to enroll in a number of mobile reminders that can be sent to your cell phone or mobile device. You will only be sent the reminders that you select when the specific activity has occurred. A few choices include:
Please visit the My Profile page to view all account activity reminders that are available.
Please contact your service provider to find out if there are fees for receiving text messages.
Your may update your mobile phone number and change enrollment options through the My Profile link within Discover.com.
Log into your account and enroll in Discover Mobile Reminders
