Samsung phones have long come with a hidden Service Menu, and the Galaxy S5 is no exception. While many people won’t ever have a need to access the Service Menu, it’s a good feature to know about in case you run into issues with your Galaxy S5 and want to troubleshoot it on your own first. (And seeing as how most of us reading this love to tinker and can’t keep our hands off the big red button, well …)

You can test sensors, make sure the touch screen is in working order, and lots more. Follow along and we’ll show you not only how to access the hidden Service Menu, but how to use the features inside of it.

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