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A secret mode on iPhone to test all the features of your phone. The diagnostic mode on an iPhone is mainly used to identify and resolve hardware and software problems. It is a valuable tool for checking and testing the various functions of your Apple phone. Why use the diagnostic mode for smartphones? Component check, make sure that all the components of the iPhone are working properly, especially before buying a used iPhone. Problem identification, detect specific problems with the hardware or software of the device, useful before entrusting it to a repair service. Troubleshooting various problems, if your iPhone is having difficulties (battery that drains quickly, screen that no longer responds, etc.), the diagnostic mode can help you determine the exact cause of the problem. Failure prevention, by performing diagnostics regularly, you can detect possible anomalies before they cause a complete breakdown of your device. Technical support, if you decide to contact technical support, the results of the diagnosis will allow you to provide precise information on the nature of the problem, which will speed up the resolution. Used sale, if you want to sell your used iPhone, a diagnostic will allow you to guarantee to the buyer that the device is in good working order. In summary, the diagnostic mode is an essential tool for your iPhone. This mode is generally used by Apple technicians, but it can also be useful for users wishing to diagnose their device themselves. Find us on Facebook @darty: / darty Instagram @darty_officiel: / darty_officiel Twitter @Darty_Officiel: / darty_officiel Darty & You: https://www.darty.com/darty-et-vous/