WalletHub, Financial Company
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There is no way to find your Best Buy Credit Card number without having the actual card. Typically, your new Best Buy Credit Card can take anywhere from 1-3 weeks to arrive in the mail.
However, you can still use your newly-approved account to pay for purchases at Best Buy in the meantime. For that, you can visit your local Best Buy store and shop as usual. You'll just need to verify a few pieces of information at the register to use your Best Buy Credit Card. This remains an option even after your physical card arrives.
You should also be able to add your new credit card to your BestBuy.com account and use it to shop online, even before the card comes in the mail. To do this, you'll want to visit our credit card page and click "Check Application Status" on the right. Then, just follow the prompts to link the card to your profile.

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