On a Galaxy S22 Ultra the screen fault to rule out first is not touch at all but the green vertical line. Owners report lines in green, pink or purple that appear without a drop or water, often right after a software update, and Samsung ran a 3-year free screen replacement offer for line faults after updates that some owners say has since ended. Lines are a failed panel, not a setting. If the picture is fine but touches are missed or invented, run the *#0*# touch test, remove any thick screen protector and try a different charger.
Differential
Likely causes of “Samsung Galaxy S22 family screen or touch input is not working correctly”, and how to tell them apart
- 1
A failing display panel (the green line)
What separates it A thin vertical green, pink or purple line that appears on its own and never goes
How to confirm Owners' threads describe it after an update with no damage; it is a hardware fault and needs a screen replacement
- 2
A thick or badly fitted screen protector
What separates it Touches are missed near the edges or the screen reacts on its own
How to confirm Remove it and test; full-glue glass is a known cause of touch problems on curved Samsung screens
- 3
Water, oil or a bad charger
What separates it Touches invent themselves, often only while charging
How to confirm Clean the screen and charge with a Samsung charger
- 4
A software glitch
What separates it It clears after a restart
How to confirm Restart, update and run the touch test
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether there is a line on the screen or only a touch fault
- Whether it began after an update, and which one
- Whether the fault shows while charging or with the protector off
- The result of the *#0*# touch grid test
Try in this order
0 of 5 completedTake off the protector and clean the screen
ReversibleRemove any screen protector and wipe the display dry.
Run the touch test
ReversibleOpen the Phone app, dial *#0*#, tap Touch, and trace the grid. Boxes turning green means the digitizer is working.
Charge on a Samsung charger
ReversibleIf touches misfire only while plugged in, change the charger and cable.
Update and restart
ReversibleInstall any update under Settings, Software update and restart.
Ask about the line
ReversibleIf a line is present, contact Samsung with the phone's model number and the date it began.
Model-specific
What is true of this model and not of its siblings
- Screen
- The S22 Ultra has a curved 6.8 inch AMOLED display; the curved edges are where full-glue protectors most often cause missed touches.
- Curved edges
- The S22 Ultra's curved edge is where a full-glue protector lifts first, which shows as missed or phantom touches along the sides rather than in the middle.
- Other models this page answers
- These steps also fit the Galaxy S22.
Stop boundary
When this stops being a self-service repair
- !If a green line appears and stays, ask Samsung whether any display replacement offer still applies to your phone before paying for a repair
- !If the touch grid test fails on a bare screen, book a screen repair
Evidence ledger
Sources behind this answer
Samsung's touch checks.
A green line appearing after a September 2025 update.
A repair-community thread on the same fault.
Exact questions
Common questions
Is the S22 Ultra green line covered for free?+
Samsung announced a 3-year free screen replacement offer for line faults after software updates, and owners say it ended in 2024 though some got free repairs afterwards. Ask Samsung with your model number.
Can software remove a green line?+
No. Owners' threads and repair guides treat it as a panel fault that needs a replacement.
How do I test the S22 Ultra touch screen myself?+
Open Samsung Members, Support, Phone diagnostics and run the Touch screen test, or dial *#0*# and tap Touch to trace the grid. A box that never turns green marks the dead zone.
Will the Touch sensitivity setting help a screen protector problem?+
Yes. Settings, Display, Touch sensitivity raises the response through a protector, which helps if it is the layer that misses touches, though a full-glue glass that lifts at the curved edge is better replaced.