Why trade-in checks matter
A phone that looks fine on the lock screen can still have hidden retention in the status bar, keyboard area, or app interface zones. Those defects can change the trade-in grade or quoted value.
Testing before the handoff helps you avoid surprises and decide whether to accept the offer or sell privately instead.
What to inspect before trade-in
Use black, gray, and white screens first, then verify any suspicious areas with red, green, and blue. This makes it easier to separate true burn-in from dirt, glare, or a temporary reflection.
Focus on the top bar, lower typing area, and any repeated navigation zones that tend to wear faster.
How to use the result
If the screen is clean, you can proceed with more confidence. If obvious burn-in appears, compare the trade-in value against other selling options before deciding.
Documenting the condition also helps if you want to challenge a grading result later.
FAQ
Can burn-in lower my iPhone trade-in value?
Yes. Visible burn-in can reduce the condition grade and lower the offer from trade-in services.
What is the fastest test before trade-in?
Black, gray, and white fullscreen checks are the fastest way to spot the most common OLED problems.
Should I test before going to the store?
Yes. A quick test helps you know whether the quoted trade-in value is likely to hold up.
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.