Provides information on CPU usage, battery health, and storage.
Apps such as Phone Diagnostics allow for thorough testing of components like touch screens, cameras, and speakers, as noted in this PCMag article.
Are you asking because of a specific (e.g., battery, touchscreen) or are you evaluating a used iPhone ? Let me know, and I can suggest the best diagnostic tools for that situation. My Device Info! - App Store - Apple
You can initiate a hardware test by turning off your phone, holding both volume buttons, and plugging it into a charger, according to this YouTube video .
Helps check sensors and parts, according to App Store descriptions.
"Test & Check for iPhone" is a utility tool designed for diagnostics and hardware monitoring on Apple devices. It is often bundled with or categorized under "My Device Info" apps on the App Store .
Dial *3001#12345#* followed by the call button to reveal advanced network settings and cellular data information, as explained in this Wilson Amplifiers blog post .
Dial *#06# to immediately show your device’s unique IMEI number, as shown in this PCMag article.