This Samsung Galaxy Dialer Code Lets You Test Each Sensor on Your Phone

With the S9 and S9+ upon us, you maybe wondering if it’s time to retire your aging Galaxy and either sell it or do a trade-in to get Samsung’s latest flagship. Before you do, however, it’s important to make sure that all its components — most notably the sensors — are working fully in order to avoid potential headaches.

Fortunately, Samsung has a secret feature that lets most Galaxy owners test out their device’s components. And best of all, this hidden diagnostic mode can be accessed simply by inputting a little-known code, making it extremely easy to test if your Galaxy’s sensors are running as they should.

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Accessing the Secret Diagnostic Menu

Before we get started, it’s worth noting that this feature may not be available on your device. Some carriers like Verizon and Sprint are known to block the code-based diagnostic mode on their Samsung smartphones and tablets. Though newer phones from Sprint, such as the Galaxy S6, seem to have this functionality restored.

With that out of the way, it’s time to get started, so open your Samsung’s phone app. From there, enter *#0*#…