Before proceeding to activate the cash card you must have a login to your Cash App account. Here is the step by step procedure for Cash App Card activation:

As soon as you sign in to the Cash App account, you will need to open the Settings tab at the bottom of the screen. Select the Cash app card icon in 'Settings'. Once you do this, you look at the screen Activate Cash App card option. To activate your card with QR code you need to allow the cash app to use your mobile camera.

Place the camera 4-5 inches above the QR code for scanning
After successfully scanning the QR code with the help of your camera, the cash app card activation number process is complete and it is ready to use.