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Exclusively for its members and available in-store only, at Costco, buy a Samsung Galaxy S8, S8+, S8 Active, or Note8 64GB Android Smartphone for AT&T on an AT&T Next installment plan (which start at $25/month for 30 months) and get a second phone for free. (At least one device must be on a new line of service. These links are for reference only; you must make your purchase in store.) Plus, you'll receive a $500 Costco Gift Card for free. Assuming you'll use the gift card, that's a savings of $1,250 and the best deal we've seen for these devices for AT&T. Additional line, activation, and upgrade fees apply. Deal ends December 7.

Note: You'll receive your phone savings as a monthly bill credit (a total value of $750). Credits will begin within three bill cycles of the purchase.