Mobile Tests
No-install tests for your phone or tablet. Find out how many touch points your screen tracks at once, and catch dead patches or phantom touches early.
Your phone screen is a grid of touch sensors, and any one of them can quit. Our touchscreen test covers it with squares. Drag a finger over every one, and a square that never clears marks a patch where the screen reported no touch. Then hands off for 10 seconds: anything that registers is a ghost touch. Last, put all your fingers down and see how many it tracks.
A dead patch or a phantom tap usually traces to one of a few things, and not always the glass. A thick or peeling screen protector dampens touch and fakes dead spots, so pull it off and retest first. Ghost touches, where the phone taps on its own, often come from a cheap charger or static rather than a failing screen. Real digitizer damage, from a drop or liquid, is what's left when those are ruled out. If a fault survives a restart and a clean screen, it's hardware.
Your browser's touch count isn't your screen's limit. Chrome on Android never goes above 5, and an iPhone always says 5 in Safari. You still get a count for every finger the browser passes on. The rest of your phone tests live here too. Dead pixel, refresh rate, and audio checks that work on a monitor all run in your phone browser, so you can scan for stuck pixels or confirm a 120 Hz panel without an app. On an iPhone, switch off one Safari flag first. Left on, it holds web pages near 60 fps.
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Foldable Screen Test
Test a foldable phone screen in your browser. Drag a finger across the crease to find dead touch strips on a Galaxy Z Fold, Z Flip, Pixel Fold, or iPhone Duo.
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Phone Burn-in Test
Check your phone for OLED burn-in in the browser. A flat gray reveals a ghost of the status bar or nav buttons, and a second look tells retention from a burn.
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Phone Audio Test
Test your phone speakers, microphone, and headphones right in the browser. No app to install, and what to do when calls, games, or media suddenly sound off.
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Phone Dead Pixel Test
Run a dead and stuck pixel test in your phone browser in minutes. What each color reveals, how OLED and LCD differ, and what to do if you find one.
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Phone Refresh Rate Test
Check what Hz your phone display is actually running. Browser test, Android Developer overlay, and why adaptive refresh drops the rate when it matters most.
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Touchscreen Test
Paint a grid over your phone or tablet screen to find dead zones, run a 10-second hands-off check for ghost touches, and see how many fingers it tracks.
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// articles
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How to Test a Used Phone Before You Buy
Buying a used phone? Run this checklist before you pay. Test the screen, touch, cameras, and speakers in the browser, and catch a locked or stolen handset.
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120Hz Not Working on Your iPhone? ProMotion Explained
Your iPhone screen stuck at 60Hz? ProMotion throttles itself on purpose, from Low Power Mode to a hidden setting. Here's what caps it and how to confirm 120Hz.
FAQ
- How do I test my phone's touchscreen?
- Open the touchscreen test, go full screen, and paint the grid with one finger. Any square still marked after you go over it twice is a dead spot. Then run the 10-second hands-off check for ghost touches and press several fingers down to see how many your phone tracks. Open the touchscreen test
- How many touch points should my phone track?
- Most modern phones handle 5 to 10 fingers at once, and tablets often more. The second number in the test's count comes from your browser, not the screen. Android only tells Chrome a minimum, so Chrome never reports more than 5, and the test counts past it anyway. On an iPhone, Safari always reports 5. Count stuck below what you expect? Spread your fingers wide and use both hands before you blame the panel.
- What causes ghost touches on a phone?
- A phantom tap is usually not the screen itself. A cheap or ungrounded charger is the most common cause, so unplug it and see if the taps stop. Static, moisture, and a poor-quality screen protector can do it too. If it keeps happening unplugged and with the protector off, the digitizer is failing.
- Why does part of my screen not respond to touch?
- Start with the screen protector, since a thick or lifting one creates dead spots that vanish once you remove it. Clean the glass and retest. If a patch still won't register after a restart, the digitizer under that area is damaged, usually from a drop or liquid, and needs replacing.
- Can I test my phone's screen for dead pixels or refresh rate too?
- Yes. Dead pixel and refresh rate tests both run in your phone browser, no app needed. Go full screen with the dead pixel test to hunt stuck dots, or run the refresh rate test to confirm your phone is really hitting 90 or 120 Hz instead of dropping to 60. On an iPhone, Safari keeps web pages near 60 fps by default, so check the iPhone steps on that test's page before you trust a 60. Test your phone for dead pixels
- Can I test my phone's camera and audio here too?
- Yes. The webcam test opens your phone's front or rear camera in the browser, and the audio tests check the speakers and mic. They're the fast way to confirm a lens or a speaker works before you blame an app. Test your phone camera