Samsung Galaxy users can run a built-in diagnostics test to assess the health of their device, which may help determine if repairs or upgrades are needed. The test is found in the **Device care** section of the Settings menu, under Diagnostics, and can also be accessed through the Samsung Members app. According to Samsung, this feature is available on Galaxy devices running Android 12 or later, though the exact menus and tests may differ based on the phone model and software version. The diagnostics can check various components, including the touch screen, cameras, microphones, speakers, physical buttons, sensors, Wi-Fi, mobile network, Bluetooth, SIM card, NFC, USB connection, charging, and fingerprint reader, depending on the Galaxy model. Some models with features like the S Pen or wireless charging receive additional specific checks. Some tests are run automatically, while others require user interaction. For example, the proximity test asks the user to cover the area around the front camera or call speaker with their palm, and another test plays audio through the in-call speaker and asks if the user can hear it. If a test fails, Samsung's app may offer troubleshooting tips or link to a related FAQ. For older Galaxy models, the battery status is often the most useful result, with Samsung rating the battery as Normal, Weak, or Bad. A Weak rating suggests that the battery's efficiency has decreased due to long-term use or environmental factors, while a Bad rating means the battery life has significantly degraded, and Samsung recommends seeking service advice. It is important to note that passing all diagnostics does not necessarily mean the phone will be as fast as it was when it was new. Samsung's tests check whether components and functions are working correctly but do not provide a CPU benchmark, assess internet speed, or evaluate performance in games. An internet speed test measures the connection the phone is using, and results can be affected by factors like distance from the router and network congestion. A benchmark like Geekbench measures processor performance and is more useful for comparing a phone with similar models. Samsung's support guidance does not specify a benchmark score at which a three-year-old Galaxy is too slow. Age alone is not a good indicator, as different Galaxy models started with varying hardware specifications. If the diagnostics pass but the phone is still slow, Samsung suggests that outdated software, background apps, insufficient available memory, or temporary system errors may be the cause. Google also notes that Android phones can begin to experience problems when less than 10 percent of their storage is free. Repeated failed diagnostic tests or a Bad battery result are stronger indicators that the phone may need servicing. If a user decides to hand over the phone for repair, Samsung's Maintenance mode can hide personal data while allowing technicians to test the device.