Some users report success in "activating" a card to their account by checking the balance: Visit the Gift Card Balance Lookup page on BestBuy.com. Enter your card number and PIN.
The app offers a way to scan and save card details for easier access: Navigate to the tab. Select Payments and then Add Gift Card . add gift card to best buy account
The most common way to "add" a card is to apply it directly to a purchase: and proceed to the Checkout page. Locate the Payment Method section. Some users report success in "activating" a card