Phone Phone testing guides
Understand your phone’s behaviour, work through a useful check, and know what the results can—and cannot—tell you.
Guides are currently in English. Interactive tests are available in eight languages.
Display & touch
How to check a phone screen and touchscreen
Inspect solid colours, touch coverage and simultaneous contacts, then distinguish repeatable symptoms from browser limits.
Read guide →Display & touchPhone refresh-rate test: understand your result
Understand estimated browser frame rate, why a 120 Hz screen can show a lower reading, and how to repeat a useful test.
Read guide →Audio
Camera & connectivity
Buying a used phone
How Phone Test works
How Phone Test tests work and what results mean
Our browser-based test method, evidence limits, content sourcing and correction process.
Read guide →How Phone Test worksPhone test compatibility: iPhone, Android and browser limits
Check which interfaces your browser exposes and understand the difference between supported, permitted and working.
Read guide →Troubleshooting
Phone microphone not working: isolate the failing step
Separate microphone permission, input selection, recording and playback before deciding what to try next.
Read guide →TroubleshootingPhone speaker crackling or silent: compare the audio path
Check output routing, volume and different audio sources before treating a sound problem as speaker damage.
Read guide →TroubleshootingGhost touch or missed touches: compare repeatable patterns
Distinguish unwanted contacts from missed areas with a controlled touchscreen and multitouch check.
Read guide →TroubleshootingDead pixel, stuck pixel or persistent display mark?
Compare a visible mark across colours and content without promising that a website can diagnose or repair it.
Read guide →