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 Apple Gift Cards are one of the most common Apple-related gifts given during the holidays, so if you've received one today, here are all of the things you can and cannot use it for.
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 In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps.
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 Flight tracker apps are a popular way to keep tabs on planes in the sky, because when you're preparing to fly or when someone you know is on board a flight, you can use them to check that things are still on schedule. But if you have an iPhone, you don't need to download and install a third-party app to track a flight - it's a handy built-in feature of the operating system.
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