You can check your Samsung Galaxy's health with a built-in test

Samsung Device Care diagnostics run on Galaxy phones with Android 12+. They test battery, touch, cameras, microphones, speakers, sensors, Wi-Fi, mobile network, Bluetooth, SIM, NFC, USB, charging, fingerprint reader, and, for some models, S Pen and wireless charging. Battery status is rated Normal, Weak, or Bad; Weak indicates reduced efficiency, Bad prompts service. If diagnostics pass but performance feels slow, Samsung cites outdated software, background apps, insufficient memory, or temporary errors, not hardware failure.