Why used iPhones need a burn-in check
Many iPhones are used for long periods with static app interfaces, bright keyboards, and repeated social media layouts. That makes retention and burn-in worth checking before payment.
A plain background reveals panel wear much more clearly than a colorful lock screen or app grid.
Best way to inspect common burn-in zones
Start with black and gray, then pay attention to the top status area, lower keyboard zone, and any repeated app bar locations.
If you see faint shapes that remain in the same place across multiple patterns, you may be looking at true panel wear rather than a reflection.
How buyers should interpret the result
Minor retention may be acceptable on an older bargain device, but obvious burn-in can reduce value and make long-term use less enjoyable.
Use the result together with battery health, storage, and asking price before deciding whether the phone is still a good deal.
FAQ
Where does iPhone OLED burn-in show most often?
Status bars, keyboard regions, and frequently used app interface areas are among the most common locations.
Should I test a used iPhone before paying?
Yes. A quick fullscreen burn-in check can reveal issues that are hard to see on the normal home screen.
Are faint ghost images always permanent?
Not always. Some retention can be temporary, but repeated visibility over time is a stronger sign of burn-in.
Run the test now
Use the OLED Test homepage to open fullscreen colors, inspect uniformity, and compare panel behavior in real time. The browser-based workflow is fast, free, and works well for quick repeat checks.