Uploaded August 2026 | Updated September 2026, 3 weeks ago

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Learn how to test your phone's touch screen using the built-in Phone Diagnostics tool on the Samsung Galaxy S26 Ultra.
This quick test checks whether your screen can accurately detect your touch across the entire display.

Steps
- Open Settings.
- Tap Device care.
- Under Additional care, tap Diagnostics.
- Tap Phone diagnostics.
- Tap Touch screen.
- Tap Test again if you've run the test before.
- Tap OK.
- Fill every square by dragging your finger across the screen.
- Review the result.

📱 Device: Samsung Galaxy S26 Ultra (SM-S948B/DS, International Version) running Android 16 Baklava with One UI 8.5
✅ Works on Samsung Galaxy S26,S26+,and S26 Ultra

#galaxys26ultra #samsung #samsungtrainer
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