Mobile Screen Test

Check your phone screen for dead pixels, touch problems, burn-in, uneven areas, and other visible display issues.

Workflow

Mobile Screen Check

Work through these checks in order on the phone you want to test. All tests run in your browser.

0 / 7 checked

Dead Pixel TestEssentialCycle through black, white, red, green and blue fullscreen backgrounds. Look closely for pixels that stay dark, bright, or one color.
Touch Screen TestEssentialUse multi-touch, drawing, and dead-zone checks. Test the entire screen, including edges and corners.
Burn-In TestEssentialUse gray and solid-color patterns to look for faint logos, status bars, keyboard outlines, or other marks that remain visible or appear different from the surrounding area.
Greyscale & Uniformity TestRecommendedCheck dark and bright detail and look for uneven gray, brightness, or tint across the display.
Brightness TestRecommendedCheck brightness behavior, dark and bright detail, and white consistency.
Color Banding TestOptionalCheck grayscale and RGB gradients for visible steps or bands.
Refresh Rate TestOptionalCheck the observed browser frame cadence and compare it with the phone's configured refresh rate.

Method

How to test your phone screen

Clean the screen. Remove fingerprints and dust before testing.
Set normal display settings. Use your normal display mode and avoid unusual color filters or display modes that change the appearance.
Turn off image-changing features. Temporarily disable Night Shift, Eye Comfort, color filters, or similar features if enabled.
Run the tests fullscreen. Use fullscreen where supported and test the phone itself, not a desktop browser.
Test the whole screen. Pay extra attention to edges, corners, curved areas, and areas around the status bar or navigation controls.
Test in both orientations. If the phone supports rotation, check touch behavior in portrait and landscape.
Record anything unusual. Note visible defects before buying, returning, or sending the phone for repair.

What to look for

Dark, bright, or stuck pixels
Touch areas that do not respond
Unexpected touches or interrupted tracking
Faint persistent marks
Uneven gray or white areas
Dark or bright details that disappear
Visible gradient bands
Unexpected observed refresh-rate results

New phone

Focus on dead pixels, touch response, uniformity, brightness, and obvious display defects.

Used phone

Also check burn-in/image retention, touch dead zones, brightness consistency, other signs of display wear, and signs of previous screen damage or repair.

Open Burn-In Test Open Touch Screen Test

iPhone and Android

iPhone

Open this page directly in Safari on the iPhone you want to test. Run the tests on the phone itself and check the touchscreen, pixels, uniformity, and image retention.

Android

Open this page directly in Chrome or another supported browser on the Android phone you want to test. Run the same checks on the device itself.

Explained

Display problems explained

Dead pixels
Pixels that stay dark or one fixed color on every background.
Touch problems
Areas that do not respond, or touches that jump and interrupt unexpectedly.
Burn-in
Faint persistent marks left by static content shown for a long time.
Screen uniformity
Whether one shade looks even from the center to the edges and corners.
Black level
How dark black and near-black shades appear on the display.
Brightness
How the screen behaves across brightness levels and whether detail is kept.
Color banding
Smooth gradients appearing as visible steps or bands.
Refresh rate
How often the display can present new frames, with browser testing showing observed frame cadence rather than guaranteeing the panel's hardware refresh rate.

FAQ

Mobile Screen Test FAQ

01How do I test my phone screen?

Open this page on your phone and work through the seven checks in order, using fullscreen where possible.

02How do I check my phone for dead pixels?

Open the dead pixel test in fullscreen and look for dots that stay dark, bright, or one fixed color on every background.

03How do I test my phone touchscreen?

Open the touch screen test and try the multi-touch, drawing, and dead-zone modes across the whole screen.

04How do I find a dead zone on my phone screen?

Use the dead-zone grid and touch every part of the screen. A cell that repeatedly does not respond may indicate an unresponsive area.

05How do I check my phone screen for burn-in?

Open the burn-in test and look for faint logos, bars, or outlines that stay visible when the background changes.

06How do I know if my phone screen is working properly?

If all seven checks look normal, you may not see any obvious display problems. Browser tests cannot detect every hardware issue.

07How do I test a used phone screen?

Run the full workflow, then pay extra attention to image retention, touch dead zones, and brightness consistency.

08Can I test my phone screen without an app?

Yes. These checks run directly in your mobile browser, so there is nothing to install.

09How do I test an iPhone screen?

Open this page in Safari on the iPhone itself and run the checks on the device.

10How do I test an Android screen?

Open this page in Chrome or another supported browser on the Android phone itself and run the checks on the device.