Cartwheel Register prioritizes in-person payments by first presenting the screen to read the credit card via the smartphone camera. These in-person requirements are for your safety and the safety of your customers.
Should you need to accept a payment via phone, you will need to wait approximately 5 seconds on the card reading screen, when you will see a "Dismiss" button appear. Tap that to manually enter card details, including expiration and CVV.
Remember that in all circumstances that it is your obligation to properly dispose of your customers' credit card information.