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4. QR Reader

You know those square boxes you see everywhere that look like broken 8-bit screens? Those are QR codes, and are the latest way brands use technology to unlock online and mobile content that’s usually pretty cool if you can access it. The only way you’ll be able to see the hidden content, though, is with a QR Reader. It’s not only free, but it’s also usually worth the 10 seconds it takes to download. Brands have been using QR codes to market a bunch of stuff, including concert tickets, free merch and tons of promotional products. Don’t be the odd man out without a QR Reader and missing out on cool digital content.

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