To activate your debit card, go to capital.one/debit or follow these steps:
Sign in to your account online or with the Capital One Mobile app. Text "GET" to 80101 to download the app.
Choose the account linked to your debit card.
Look for a button to activate your card near the Debit Card Tracker
Select “Activate My Card” and follow the steps shown. You may be asked to set a PIN to complete the activation process.