The title basically says it all: if you're thinking of switching to U.S. Cellular as your family's mobile provider, the company will give you a $300 Mastercard debit card. All you have to do is sign a new two-year agreement with the regional carrier for two or more lines of service, one of which must be a smartphone. Past that, it's a done deal. You get new phones and service, they give you $300.
Here's the best part: there's no minimum purchase price on the phones, and the deal is good on any data plan of $20 or higher. Naturally, the account must remain in good standing to receive the debit card. Otherwise, it's free money.