You noticed a tiny fixed dot on your iPhone screen while reading a message. It does not respond to touch. It does not move when the content changes. It is in exactly the same position on every app, every background, every page. A dead pixel on an iPhone behaves exactly like a dead pixel on any other screen, with one important difference: whether your iPhone has an LCD or OLED panel changes what the failure looks like and what your options are.
Before doing anything else, open Safari on your iPhone and navigate to the dead pixel test. Tap the expand icon to go fullscreen and cycle through every solid color background. This confirms in two minutes whether you have a dead pixel, a stuck pixel, or something like dust or a surface smudge. The test is the same regardless of which iPhone model you have, and the result tells you exactly which conversation to have with Apple.
The difference between LCD and OLED matters here. iPhones from the iPhone 6 through the iPhone 8 use LCD panels. The iPhone X and every model after it uses OLED. A dead pixel on an LCD iPhone is a specific hardware failure with a clear appearance. OLED iPhones fail differently, and what people call a dead pixel on an OLED iPhone is often a stuck pixel or early burn-in rather than a true transistor failure.
How Dead Pixels Look Different on LCD vs OLED iPhones
An LCD dead pixel is straightforward. The thin-film transistor controlling that cell has failed. No voltage reaches the liquid crystal, so the crystal stays closed and blocks the backlight permanently. The result is a sharp, pure black dot with pixel-defined edges. It is invisible on a black background and clearly visible on every light background.
OLED panels work differently. Each pixel on an OLED screen produces its own light. When a pixel is set to black, it is simply turned off and emits nothing. A true dead pixel on an OLED iPhone, where the subpixel driver has completely failed, produces a black dot that cannot be turned on at all.
True dead pixels on OLED iPhones are less common than on LCD models. The more typical OLED failure is a stuck pixel, where one or more subpixels are locked in an illuminated state. This appears as a tiny bright or colored dot rather than a black one. A stuck red subpixel on an OLED iPhone produces a faint red dot. A stuck green subpixel produces a green dot. Unlike on an LCD, where a stuck pixel shows its locked color on every background, an OLED stuck pixel is most visible against dark backgrounds.
A third type of OLED display issue is burn-in. This is not a dead pixel. Burn-in appears as a faint ghost of a previous interface element, most often the status bar, battery indicator, or a navigation bar that was displayed at high brightness for extended periods. It looks like a subtle discoloration or shadow visible on gray or mid-tone backgrounds. The test result is different from a dead pixel: burn-in is faint and spread over a larger area, while a dead pixel is a single sharp defined point.
For the full technical breakdown of what dead and stuck pixels look like at the subpixel level, see what is a dead pixel.
How to Test Your iPhone Screen for Dead Pixels
Open the dead pixel test in Safari on the iPhone. Tap the icon to expand to fullscreen. Set your iPhone screen brightness to maximum before running the test.
Cycle through each background:
On black: a dot that glows any color is a stuck pixel with an active subpixel. A completely dark dot is either dead or invisible on this background. OLED iPhones make black dead pixels invisible on a black background because the surrounding pixels are also off.
On white: a black dot with sharp pixel-defined edges is a dead pixel. A colored dot is a stuck subpixel. A faint ghost smudge over a wider area is burn-in.
On red, green, and blue: a dead pixel appears black against each color. A stuck subpixel may look more or less obvious depending on which color is displayed. A dead blue subpixel, for example, produces a yellow dot that is nearly invisible on a white background but obvious on a blue one.
Take a photo of any defect you find with another device rather than a screenshot. Screenshots do not capture hardware pixel defects because they record the intended signal, not the actual display output. A photo with a phone camera or digital camera shows exactly what the hardware is producing.
What Causes Dead Pixels on iPhone
For LCD iPhones, the cause is almost always one of four things: a manufacturing defect in the panel, physical impact damage, prolonged pressure on the screen, or a failing display cable.
Physical impact is the most common cause of dead pixels on phones. Dropping an iPhone on a hard surface can damage individual cells or clusters without visibly cracking the glass. The damage shows up as dead pixels or stuck pixels in the impact area, usually near the corner or edge where the force was concentrated.
Prolonged pressure on an iPhone screen, such as carrying the phone face-down in a tight pocket with keys or coins, can damage LCD cells. A single event of sufficient force can create a pressure cluster that develops over one to three days.
For OLED iPhones, the failure modes are different. True dead pixels from component failure are uncommon. More typical issues are stuck pixels from manufacturing variation, early OLED degradation producing dim or discolored areas, or burn-in from static content displayed at high brightness for extended periods. iPhones above the iPhone X have an automatic brightness and color-shifting feature (True Tone and Night Shift) that Apple designed partly to reduce OLED burn-in risk.
Display cable problems, where the ribbon cable between the logic board and the display is loose or damaged, can produce dead pixel lines or flickering rather than isolated dots. If what you see is a line rather than a dot, see the dead pixel line guide for the specific diagnostic steps for that failure type.
Apple's Coverage for iPhone Dead Pixels
Apple covers display defects, including dead pixels, under the one-year limited warranty that comes with every iPhone and under AppleCare or AppleCare Plus when the defect is a manufacturing fault rather than physical damage.
Apple does not publish a specific minimum dead pixel count for replacement. In practice, a single clearly visible dead pixel near the center of the iPhone screen is typically sufficient for a replacement or display repair at an Apple Store when the device is under warranty. Apple technicians have discretion, and a defect that is genuinely affecting the display experience is handled consistently.
The process: book a Genius Bar appointment at an Apple Store. Bring the iPhone with the dead pixel visible. Take photos beforehand on another camera to document the defect in case it is difficult to reproduce under store lighting. Apple technicians will inspect the display and either replace the entire phone (common for newer devices) or replace the display module (common for slightly older models).
Physical damage complicates everything. If there is any sign of a cracked screen, bent frame, or liquid damage indicator triggered, Apple classifies the repair as out-of-warranty damage rather than a manufacturing defect. AppleCare Plus covers two incidents of accidental damage per year with a service fee, which is worth checking if your phone has any physical damage alongside the dead pixel.
Out of warranty and without AppleCare Plus, Apple charges $279 to $379 for an iPhone display replacement depending on the model. Third-party repair shops charge $80 to $180 for the same work using aftermarket or refurbished displays. Apple's genuine part repair preserves TrueDepth camera functionality and Face ID without issues. Some third-party replacements affect Face ID reliability or display color accuracy.
Samsung Galaxy Dead Pixels and What Samsung Covers
Samsung Galaxy phones use OLED panels across most of the lineup. Dead pixels on Samsung phones show the same pattern as on OLED iPhones: true black dead pixels are less common than stuck or dim subpixels.
The Galaxy Fold and Galaxy Z Flip lines have additional display concerns. The foldable OLED panels on these devices have a crease at the fold point that can cause localized pixel stress over time. A dead pixel or dead pixel cluster that appears along the fold line on a Galaxy Fold is a known failure mode, and Samsung has handled these under warranty on a case-by-case basis.
Samsung's dead pixel warranty in the US covers manufacturing defects for one year. Samsung's threshold varies by device and region. Consumer Galaxy phones typically require documentation of the defect and may require a minimum count for coverage, unlike Apple's more flexible case-by-case approach. The detailed brand-by-brand comparison of dead pixel policies and replacement thresholds is in the dead pixel test guide.
For the Note 8 and Note 10 Plus specifically, which appear in many dead pixel searches: these devices use Samsung's AMOLED panels, and dead pixels on them follow the same OLED rules. A fixed dark dot on every background is a dead subpixel cluster. A colored dot visible on dark backgrounds is a stuck subpixel. Test the same way as any OLED device.
When to Repair vs Replace a Phone with Dead Pixels
The decision on a phone is simpler than on a laptop because phone screen replacements are faster and more standardized.
Under warranty: always go to Apple or Samsung for the repair. Do not attempt third-party repairs on an in-warranty phone. Any unauthorized repair voids the remaining warranty.
Out of warranty, phone is less than two years old: a dead pixel in a central location that disrupts daily use is worth repairing. A single pixel in the corner is not. Phone screens are well-documented repairs with standardized parts, and the total cost at a quality shop is usually $80 to $180.
Out of warranty, phone is three or more years old: weigh the repair cost against the phone's value and whether the next OS update will still support it. A $150 display repair on a phone that will be replaced in six months is rarely the right call.
Physical damage alongside the dead pixel changes the calculation. A phone with a cracked screen and dead pixels may need a new display anyway, and the dead pixel becomes part of the same repair rather than a separate decision.
The developer section has the dead pixel test ready to use in Safari or Chrome. Run it once more before booking any repair to confirm the defect type and exactly how many pixels are affected.
