Why is there a purple line on my iPhone
A line pattern shows a missing or extra row instantly; the colour tiles below show whether it is on every colour.
Plain colours, full screen:
Purple vertical lines on an iPhone screen are almost always the display itself: the flex connector between the panel and the board has lifted (often after a drop or a swollen battery pushing from behind), or a row or column driver on the panel has failed.
Test it now
Full-screen white, then black, then each colour. A panel line is fixed and identical on all of them. Take a screenshot: if the line is in the screenshot, it is software or the graphics chip. Press gently around the edge of the screen: a line that flickers under light pressure is the flex connector.
What it is
Purple vertical lines on an iPhone screen are almost always the display itself: the flex connector between the panel and the board has lifted (often after a drop or a swollen battery pushing from behind), or a row or column driver on the panel has failed. A single thin vertical line in one colour is the classic OLED panel fault. Lines that only appear in one app, or that flicker with the screen brightness, are software or the display driver, and those are fixable in settings.
Can it be fixed?
Software or driver: yes, free. Lifted flex connector: sometimes, a repair shop can re-seat or replace the flex for a fraction of a display. Panel driver or a dead column: no — new display assembly. A line that appeared after a drop is accidental damage and not a warranty fault.
What to do
- Screenshot first — if the line is in it, update the phone and check developer display settings.
- Full-screen colours: fixed on all = panel or flex.
- Gentle pressure at the edge: flickers = flex; quote for a flex re-seat before a display.
- No change: display assembly quote; check warranty if there was no drop.
What a repair costs
| United States | $80–200 for a display on most Android phones; $200–380 at Apple for an iPhone screen out of warranty ($29–99 with AppleCare+) |
|---|---|
| India | ₹2,000–6,000 for a display on budget and mid-range Android phones at an independent shop, ₹6,000–20,000 for flagship OLED screens at the brand service centre; iPhone screens ₹12,000–35,000 at Apple-authorised service |
Typical ranges from repair-shop and manufacturer price lists, 2026-09-06. Get two quotes; prices vary by model and city.
Warranty
Most makers replace a panel under warranty for physical panel faults that are not accidental damage; pressure marks, cracks and liquid damage are treated as accidental and are not covered. For dead pixels, each brand has a threshold (typically 3–5 bright or 5–8 dark pixels on a laptop; Dell's premium-panel guarantee replaces at one bright pixel).
A purple line is the panel, and the ten-second test proves it
Take a screenshot. Open it in Photos and look at the place where the line is. If the line is not in the screenshot, it is the display hardware. A screenshot is captured before the picture reaches the screen, so anything the panel adds — a line, a tint, a dead patch — is invisible to it. Anything the software adds is in it.
That one test settles nine cases in ten. A purple, green, pink or white vertical line that runs the full height of an iPhone screen, one or two pixels wide, sharp-edged, present on the lock screen and in every app, and absent from a screenshot, is a fault in the OLED panel or the flex cable that feeds it. No update, no reset, no restore will change it, and every guide that tells you to “update iOS” or “restore in iTunes” for a line that fails the screenshot test is wasting your evening.
What the line physically is
An OLED iPhone screen (every iPhone X and later, except the XR, 11 and SE) is a grid of self-lit pixels driven by row and column traces etched into the panel. A single thin vertical line is one column trace broken or shorted: the pixels in that column are stuck on (purple, green or white) or stuck off (black). It is one hair-fine conductor, and it cannot be repaired — the whole panel is replaced.
A thicker band, several lines together, or lines that come and go point one layer up, at the flex cable that connects the panel to the logic board. The flex folds under the panel at the bottom of the phone; a drop, a swollen battery pushing from behind, or moisture at the connector lifts or cracks it. Flex faults are the ones that flicker when you press the frame near the bottom edge or when the phone warms up.
Purple and green are the same fault at different points: the OLED uses red, green and blue sub-pixels, and which colour a stuck column shows depends on which sub-pixel trace failed. Green lines are more often reported on iPhone X, XS and 11 Pro; purple and pink on the 12, 13 and 14 families. It is the same diagnosis and the same repair.
Why it “appeared after the update”
This is the most common thing people say, and it is almost always a coincidence with a real mechanism behind it. A panel column that is on the edge of failing is temperature-sensitive. An iOS update makes the phone work hard for twenty minutes and run warm; a weak trace that had been passing signal opens up, and the line is there when the phone comes back. The update did not cause the fault; it revealed one that was days away anyway.
Two things do make it software, and the screenshot test finds both. A line that is in the screenshot is being drawn by the system — a rendering fault, a broken app, or the graphics side of the chip — and a restart, then an update, then a restore in that order will usually clear it. And a line that appears only in one app, or only in video, is that app, not the phone.
Press, warm, tilt — the three follow-up checks
Press. With the screen on white, press gently on the frame at the bottom edge, then near the earpiece. A line that flickers, thickens or vanishes under pressure is the flex connector, not the panel. That matters because a flex re-seat or replacement at an independent shop is a fraction of the price of a display.
Warm. Note whether the line is worse after gaming, charging or lying in the sun, and better cold. Temperature sensitivity says the trace is cracked rather than dead, which changes nothing about the repair but tells you it will get worse, not better.
Tilt. Look at the line at a steep angle. A hardware line stays exactly the same width; a line that seems to move or shimmer is a moiré or a screen protector edge, not the panel. Peel a case and a protector off before you conclude anything.
What Apple will and will not do
Apple replaces the whole display assembly — panel, glass, flex — as one part. It does not repair lines.
Under the one-year warranty, with no impact damage, a vertical line is a display defect and Apple replaces it free. Take the phone in with the line visible; do not restore it first, because a line that “sometimes goes away” is hard to demonstrate at the Genius Bar.
With AppleCare+, a line after a drop counts as accidental damage and costs the screen-damage service fee, which is far below the out-of-warranty price.
Out of warranty, Apple’s screen replacement runs from the low hundreds of dollars for older models to well over three hundred for a current Pro; in India the equivalent is roughly ₹15,000 on an older OLED model to ₹30,000 and up on a current Pro. An independent shop fitting a quality aftermarket OLED is typically half that, with two costs to know about: a non-Apple panel triggers the “Unable to verify this iPhone has a genuine Apple display” notice in Settings, which is cosmetic, and on models with Face ID the ambient light and True Tone calibration may not carry across unless the shop transfers it.
When a flex repair is worth trying first
If the press test moves the line, ask a repair shop to open the phone and re-seat the display flex before quoting a display. On many phones that is a fifteen-minute job. If the flex is visibly cracked they can replace the flex alone on some models; on models where the flex is bonded to the panel it is a display. Either way you have spent very little to find out, and the shop will tell you honestly because a re-seat that holds means you come back for nothing else.
Do not try this yourself on an iPhone with a swollen battery. If the back glass or screen is lifting at the edge, the battery is the reason the flex failed and it needs replacing at the same time.
Living with it, and the one thing not to do
A single line on an OLED does not spread the way a crack does; a stuck column stays one column. Many people run a phone with one line for a year. What does spread is a flex fault, which typically goes from one line to several to a black or flickering region over weeks, so a line that changes is the one to book in.
The one thing not to do is press hard on the line itself “to reseat the pixels”. On an OLED that adds a pressure mark to the line, and a pressure mark is a second, larger fault that also needs a panel.
What a repair costs
United States: $80–200 for a display on most Android phones; $200–380 at Apple for an iPhone screen out of warranty ($29–99 with AppleCare+)
India: ₹2,000–6,000 for a display on budget and mid-range Android phones at an independent shop, ₹6,000–20,000 for flagship OLED screens at the brand service centre; iPhone screens ₹12,000–35,000 at Apple-authorised service
Warranty
Most makers replace a panel under warranty for physical panel faults that are not accidental damage; pressure marks, cracks and liquid damage are treated as accidental and are not covered. For dead pixels, each brand has a threshold (typically 3–5 bright or 5–8 dark pixels on a laptop; Dell's premium-panel guarantee replaces at one bright pixel).
Frequently asked questions
Can a purple line on an iPhone be fixed with a software update?
Only if the line appears in a screenshot. Take one: a line that is missing from the screenshot is in the panel or its flex cable, and no update, reset or restore will remove it. A line that is in the screenshot is software, and restart, update and restore in that order usually clear it.
Why did a green or purple line appear after updating iOS?
Usually a coincidence with a mechanism: an update runs the phone warm for a while, and a panel column trace that was already cracked opens up under the heat. The update revealed a fault that was days away in any case. Check with a screenshot: if the line is not in it, the update is not the cause.
How much does Apple charge to fix a line on an iPhone screen?
Apple replaces the whole display, free under warranty if there is no impact damage, for the AppleCare+ screen fee if you have it, and otherwise from the low hundreds of dollars on older models to over $300 on a current Pro — roughly ₹15,000 to ₹30,000-plus in India. An independent shop with an aftermarket OLED is typically about half.
Will the line spread?
A single stuck column on the panel usually stays as one line. A flex-cable fault — the kind that flickers when you press the bottom of the frame — tends to grow from one line to several and then to a flickering or dark region over weeks, so a changing line is the one to repair soon.
Does a purple line mean the iPhone is water damaged?
Not by itself. A line after moisture is usually corrosion at the display flex connector, and it often comes with touch problems or a tint. A clean single line with no other symptom and no liquid exposure is simply a failed panel column. The liquid contact indicator in the SIM tray tells the technician which.
Related
Also free on Toolsitz: Screen Test Tool — no login.