How To activate your Cash App card? For that, you'll have to follow a couple of straightforward advances. To begin with, open the Cash App on your cell phone and tap the card-formed symbol on the lower-left corner of the screen. Then, select "Activate Cash App Card" and adhere to the on-screen directions, including examining the QR code or physically entering the card's data. When finished, your card will be activated, and you can begin involving it for buys and withdrawals at any upheld area.