Add a card within the app
On the main screen -> Click on the Menu -> Add a card -> Save
Change cards within the app
When you have more than one card on file, you can select which card you want to charge a ride to. Before confirming your Summon, you must first set your pickup location, and then toggle between cards. See below:
Update card info online
You can update your credit card information instantly at the link below:
You can also access the credit card update web form from your personal page (which also includes trip history) at www.summon.com/trips.