A Comprehensive Checklist for Purchasing Used iPhones.

4 min readAug 25, 2023

Buying a used iPhone can be a smart way to save money while still getting a high-quality device. However, to ensure a smooth and satisfactory experience, it’s essential to thoroughly inspect the device before making a purchase. This article provides a comprehensive checklist of steps to follow when buying a used iPhone.

1. Serial Number Verification:

Start by checking the device’s serial number to verify its authenticity and history. Navigate to Settings > General > About to find the serial number. Use Apple’s official website (https://checkcoverage.apple.com/) to validate the serial number. A “replaced” status could indicate potential issues like insurance fraud or theft, warranting caution.

Serial number check on Apple coverage website

2. Model Number Scrutiny:

Examine the model number to determine the iPhone’s status. A model number beginning with “M” signifies a brand-new device, while “N” indicates a replaced unit, and “F” signifies a refurbished one. Devices with “N” and “F” models might have hardware or regional lock issues. Opt for devices with “M” model numbers for a safer choice.

3. MDMS Check (Nepal Only):

If you’re in Nepal, it’s crucial to verify if the iPhone is registered on the MDMS website (https://mdms.nta.gov.np/public). This registration is mandatory for imported devices. Check the registration status using the IMEI number, which can be found in Settings > General > About.

4. Battery Health Assessment:

Inspect the battery health to ensure its longevity. Navigate to Settings > Battery > Battery Health & Charging. Battery health above 90% indicates excellent performance, while over 85% is considered good. Avoid devices with battery health below 85%.

5. Speaker Functionality:

Thoroughly test both the earpiece and loudspeaker volumes. Maximize the loudspeaker volume and compare it with another iPhone. Consistent sound quality indicates functional speakers. Dust in the speaker grill might affect audio quality.

6. True Tone Validation:

Check for the True Tone option in the display settings to verify the screen’s authenticity. This can help detect display tampering or replacement. Access it through the control panel and ensure the toggle works as expected.

7. Face ID Testing:

Test the Face ID feature for proper functionality. Navigate to Settings > Face ID and Passcode > Set Up Face ID. If the feature works smoothly without errors, the Face ID sensors are operational.

8. Physical Condition Examination:

Thoroughly inspect the device for physical damage like scratches, dents, or cracks. Pay close attention to the camera lens, as cracks can impact picture quality.

9. Camera and Microphone Check:

Evaluate the quality of both front and rear cameras. Check for proper autofocus and functionality of all camera lenses. Test the microphone during video recording to ensure audio quality.

10. Carrier Support Verification:

Insert a local SIM card and ensure the device can connect to the network and make calls. Lack of network signals might indicate regional locking.

11. Storage Verification:

Cross-check the device’s storage with the claimed amount. Verify this in Settings > General > iPhone Storage to ensure accurate specifications.

12. Apple ID Lock Check:

Confirm if an existing Apple ID is logged in. Request its removal or reset the device from the settings menu. If the device asks for an Apple ID password after reset, it might be locked.

13. Required Documentation:

Ask the seller for original purchase documents, warranty papers, and the device’s original purchase date. Match the IMEI number on the box with the phone.

14. Charger Assessment:

Inquire about the original charger and prefer an 18W fast charger over a 5W one. Check the charging port for cleanliness and proper functionality.

15. Buttons Inspection:

Ensure that all buttons are functional and clicky, including the volume rockers, power button, and any other buttons present on the device.

Purchasing a used iPhone can be a great investment if done carefully. Following this comprehensive checklist will help you make an informed decision, ensuring you get a device that meets your needs and expectations. By verifying the device’s history, functionality, and physical condition, you’ll be well-equipped to confidently buy a used iPhone.