Check the model number in Settings > General > About and verify it on Apple’s official website
Compare the serial number and IMEI in Settings with the SIM tray, box, and device engraving
Verify the serial number on Apple’s Check Coverage page
Confirm the device runs iOS and can access the App Store, iCloud, and Apple services normally
Inspect the build quality, logo placement, buttons, ports, and screen fit for inconsistencies
Check for genuine Apple parts and service history in Settings > General > About, if available
Ensure Face ID or Touch ID works properly and is not replaced with a fake component
Test True Tone, display brightness, speakers, microphones, cameras, and haptics
Look for signs of tampering, mismatched screws, glue marks, or uneven seams
Verify the box, accessories, and documentation match Apple’s packaging standards
Check battery health and cycle behavior in Settings > Battery > Battery Health
Use Apple Support or an Apple Store to confirm the device’s authenticity
Be cautious if the device is missing Apple branding, has unusual software, or is sold at an unrealistically low price