What Should I Do To Activate Cash App Card If Don’t Know The Process? Don’t worry if you don’t know how to Activate Cash App Card! To activate the Cash App card, you have to scan the QR code using your mobile device. Besides, you can also enter the details of your card manually if you are looking to activate your card on your own. https://www.cash-app-helps.com/blog/how-to-activate-cash-app-card/