If the screen on a Galaxy S25 Ultra misses touches or presses by itself, remove the screen protector and any case that presses on the edges, wipe the screen dry, and restart. The S25 Ultra's under-display ultrasonic fingerprint reader works only with a protector made for it, and a bad one also spoils touch. A vertical green, pink or white line that appears after an update is a failing display, and needs a Samsung screen repair.
Differential
Likely causes of “Samsung Galaxy S25 family screen or touch input is not working correctly”, and how to tell them apart
- 1
A protector that does not suit the phone
What separates it Touches miss and the fingerprint reader fails
How to confirm Remove it and test; buy one made for the S25 Ultra
- 2
Charger noise
What separates it Ghost touches only while charging
How to confirm Use a Samsung 45W charger and cable and compare
- 3
A software glitch after an update
What separates it It began after a One UI update and clears on restart
How to confirm Restart, install the next patch and wipe the cache partition
- 4
A display line
What separates it A green, pink or white line appears and stays, often after an update
How to confirm Book Samsung display service
- 5
Water or a dirty screen
What separates it Touches invent themselves when wet
How to confirm Dry the screen completely
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether a protector is fitted and which
- Whether touches misfire only on charge
- Whether a line appeared after an update
- The Samsung Members touch test result
Try in this order
0 of 5 completedTake off the protector and case
ReversibleClean the screen and test with nothing on it.
Test on battery
ReversibleUnplug the charger; use a Samsung 45W charger and cable if it only happens while charging.
Run the touch test
ReversibleSamsung Members, Support, Phone diagnostics, Touch screen.
Restart and update
ReversibleInstall the latest One UI patch and restart.
Ask Samsung about a line
ReversibleIf a line appears, contact Samsung with the model number and the date it began.
Model-specific
What is true of this model and not of its siblings
- Flat screen and S Pen
- The S25 Ultra has a flat screen that takes a protector evenly; its S Pen writes on the glass with its own digitizer, so a touch fault can show in pen input separately.
- Line reports
- Samsung Members owners describe green lines on the S25 Ultra after One UI 7, so a line right after an update is a known pattern.
- Other models this page answers
- These steps also fit the Galaxy S25+, Galaxy S25.
Stop boundary
When this stops being a self-service repair
- !If a line stays on a bare screen, book service
- !If a dead zone stays on a bare screen, book service
- !If the glass is cracked, stop using it
Evidence ledger
Sources behind this answer
Charger, accessibility, gestures, moisture, updates, Safe mode and diagnostics.
Per-model battery, charging, chip, storage, Wi-Fi, display and glass, citing Samsung and reviews.
Samsung's suggested US screen repair prices by model.
Exact questions
Common questions
Why does my S25 Ultra fingerprint reader stop working with a screen protector?+
The reader is ultrasonic and sits under the glass; a protector that is thick or lacks the right cutout or material can block it and spoil touch.
Is the green line on my S25 Ultra covered?+
Owners report lines appearing during or after updates with no drop. Ask Samsung about a display repair; it is a hardware fault that software does not clear.
Does Touch sensitivity help on an S25 Ultra?+
Yes, Settings, Display, Touch sensitivity improves response through a protector.
Does the S Pen still work if my fingers do not register on the S25 Ultra?+
Often yes, because the S Pen is read by a separate layer from finger touch. If the S Pen works and fingers do not, the capacitive touch layer or a protector is the likelier fault, and that is useful to tell Samsung.
Is the S25 Ultra's glass the same as older Ultras?+
Samsung describes the S25 Ultra's front glass as Corning Gorilla Armor 2, which resists scratches and cracks better than earlier generations, so a touch fault is more often a protector or software than a damaged panel.