Symptoms
- Single taps work fine
- Pinch-to-zoom doesn't work
- Two-finger gestures fail
- Typing games or apps needing multiple simultaneous touches don't respond correctly
Likely causes
- CommonDigitizer damage affecting multi-touch sensingPhysical damage can selectively affect the sensor grid needed for multiple simultaneous touch points.
- CommonScreen protector interferenceA thick, poorly applied, or damaged protector can dull the ability to sense two points at once.
- PossibleSoftware bug after an updateRarely a system update can disrupt multi-touch handling until fixed.
What to do
- Remove the screen protector and case, then retest pinch-to-zoom in a photo app.
- Restart the phone to rule out a temporary software issue.
- Test in multiple apps to confirm it's not one app's specific gesture handling.
- Check for a pending software update.
- If the issue started after a drop, treat it as likely hardware damage.
Tools and parts
- Microfiber cloth
Screen digitizerSearch: “digitizer replacement for [your phone model]”
When to call a pro
See a repair shop if multi-touch fails across apps with no protector, after a restart and update, especially following a drop.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.