Short answer
'Unknown Part' means iOS couldn't verify a replaced part as genuine Apple. 'Used' means it's a genuine part that was previously in another iPhone. Unknown parts can affect features, warranty cover and resale value.
Since iOS 15.2, iPhones show a repair history for key parts. It's one of the best tools for checking a used iPhone.
Where to look
Settings › General › About › Parts and Service History. The section only appears if a part has been replaced.
What the labels mean
| Label | Meaning |
|---|---|
| Genuine Apple Part | Replaced with a verified Apple part |
| Used | Genuine part previously installed in another iPhone |
| Unknown Part | Not verified — possibly non-genuine, or not calibrated |
Why it matters
- Non-genuine screens can lose True Tone, brightness or touch accuracy.
- Non-genuine batteries may not report health correctly.
- Faults linked to unknown parts aren't covered by Apple's warranty.
- Phones with unknown parts are worth less on trade-in.
Sources
Find Next Phone is an independent retailer. Apple, iPhone and iOS are trademarks of Apple Inc. Illustrations are our own and are not Apple product images.