Is your iPhone screen original? The fastest, most reliable way to tell is built into the phone itself: open Settings → General → About → Parts and Service History. On an iPhone 11 or newer (not the SE 2nd/3rd gen), a genuine Apple display shows “Genuine Apple Part” next to Display; a non-genuine or unverified one shows “Unknown Part”; and if that section isn’t there at all, the screen was never replaced. Below are the step-by-step checks, what the warning really means, and the physical tells to watch for in South Africa.
Whether you’ve bought a used iPhone, had a screen swapped at a local repair shop, or are just curious, knowing what’s on your phone matters — for resale value, for warranty questions, and for setting expectations about features like True Tone.
The definitive check: Parts and Service History
This is the one test Apple itself built for exactly this question, and it’s the place to start.
- Open Settings.
- Tap General, then About.
- Scroll down to Parts and Service History (only appears if the phone has been repaired, or on supported models).
- Look at the entry next to Display.
Here’s what each label means:
- “Genuine Apple Part” — the display was replaced using a genuine Apple part and Apple’s verified process (typically Apple or an authorised/independent provider with access to genuine parts).
- “Unknown Part” — the display isn’t a verified genuine Apple part. It may be aftermarket, pulled from another iPhone, not functioning as expected, or simply not linked to the phone after the repair.
- “Used” — on iPhone 15 and newer with iOS 18 or later, this means the display was previously used or installed in another iPhone.
- “Finish Repair” — a new Apple display has been installed but the repair hasn’t been completed through Repair Assistant yet.
- No section at all — on supported models this usually means the screen is original and has never been replaced. On older iPhones (iPhone X or earlier), the menu doesn’t show display history at all, so you’ll need the other checks below.
One detail worth knowing: an “Unknown Part” message can affect the trade-in value of the device, according to Apple, even though it doesn’t stop the phone from working.
What “Unknown Part” actually means
This is where a lot of confusion — and panic — comes from. The “Unknown Part” notice is a software serialization check, not a verdict on screen quality.
Apple pairs key components, including the display, to the phone’s logic board at the factory. When a replacement screen is installed, the system checks whether that part is verified. If it isn’t — which includes a perfectly good aftermarket panel, or even a genuine Apple screen moved from another phone without Apple’s pairing step — iOS flags it.
The practical upshot:
- For a screen, the warning typically only disables True Tone (and can affect the ambient-light sensor). Core functions — touch, display quality, brightness, Face ID — are not disabled by the message itself, provided the replacement is a decent panel.
- It’s a notification, not a hardware failure report. For the first few days it shows on the lock screen, then it settles into the Settings menu.
So an “Unknown Part” message tells you the screen wasn’t verified through Apple’s system — it does not by itself mean the screen is broken or dangerous. That distinction matters, especially if a local shop just fitted a quality aftermarket panel.
Secondary check: True Tone
True Tone automatically adjusts the screen’s white balance to match the light around you. Because it relies on calibration data tied to the original display, a replacement often loses it — which makes True Tone a useful clue.
To check:
- Open Control Center (swipe down from the top-right on Face ID models; up from the bottom on older ones).
- Press and hold the brightness slider.
- Look for the True Tone button (a small icon top-left of the expanded slider).
If the True Tone button is missing, that’s a strong sign the screen has been replaced with a non-genuine part or that the original screen’s calibration data wasn’t carried across. One caveat: some aftermarket screens and programmers can now restore True Tone, so its presence alone doesn’t prove the panel is a genuine Apple one — but its absence is a meaningful tell.
Physical tells: what your eyes can spot
If the software check isn’t available (older iPhone) or you want a second opinion, a careful look can reveal a lot.
- Bezels. Genuine iPhone screens have uniformly thin, consistent black borders. Many aftermarket panels have noticeably thicker bezels, especially along the bottom edge.
- Colour and tint. Compare against a known-good iPhone if you can. Non-genuine panels may show a colour shift — an odd blue, yellow, or grey tint — lower maximum brightness, or poor readability in direct sunlight.
- Uniformity and brightness. Genuine displays are evenly lit and stay bright outdoors. Aftermarket panels can be uneven or dimmer.
- Flushness. Run a finger along where the screen meets the frame; a poorly fitted replacement may sit proud or unevenly seated.
None of these are proof on their own, but several together are a strong signal.
Why this matters in South Africa
South Africa has a large, active market for used iPhones and for screen repairs — and a wide range of part qualities on offer. A few local realities:
- Buying used: Always check Parts and Service History before you pay. An “Unknown” or “Used” display entry is normal on a repaired phone, but it should be reflected in the price, and it affects trade-in or resale value later.
- Aftermarket is common: Many shops fit aftermarket panels because they’re far cheaper than genuine Apple displays. That’s a legitimate choice for many owners — the key is knowing what you got, not being told it’s something it isn’t.
- Shop quality varies: Some independent repairers use genuine or high-grade pulled panels; others use budget aftermarket. The “Unknown Part” message appears either way, so it can’t tell you *which* — only that the part wasn’t Apple-verified.
If you’re sourcing a replacement yourself, browse our phone parts and compare grades before you commit.
Can you still use a phone with a non-genuine screen?
Yes. A phone with an aftermarket display generally works fine for everyday use — calls, apps, messaging, cameras — and only loses the features tied to Apple’s calibration (mainly True Tone, sometimes ambient-light behaviour). The risks Apple flags with non-genuine displays are real but mostly about *quality consistency*: touch responsiveness, colour accuracy, maximum brightness, and — in poorly done jobs — the chance of a loose part affecting the battery.
The honest takeaway: a non-genuine screen isn’t automatically a problem, but quality varies widely. Buy from a source you trust, ask what grade of panel you’re getting, and don’t be alarmed by the “Unknown Part” notice if the phone otherwise works well.
If you’re weighing a repair in the first place, our phone repair tools guide cover the money and the DIY side.
FAQ
How do I check if my iPhone screen is original?
Open Settings → General → About → Parts and Service History (iPhone 11 and newer, except the SE 2nd/3rd gen). “Genuine Apple Part” next to Display means genuine; “Unknown Part” means non-genuine or unverified; no section usually means the screen was never replaced.
What does “Unknown Part” mean on an iPhone?
It means the installed display wasn’t verified through Apple’s system — typically an aftermarket panel, a screen pulled from another iPhone, or a genuine part that wasn’t paired after fitting. It’s a software serialization notice, not proof the screen is faulty; it mainly disables True Tone.
Will a non-genuine screen affect Face ID?
No. Face ID lives in the front sensor assembly, not the display, so fitting a non-genuine screen doesn’t disable it. The “Unknown Part” warning relates to the display only. (Face ID *can* be put at risk during a careless repair if the sensor module is damaged — but that’s a fitting issue, not the screen’s grade.)
Can True Tone be restored on an aftermarket screen?
On a genuine or used-genuine Apple screen, iOS 18’s Repair Assistant can restore True Tone after pairing. On an aftermarket panel, True Tone usually needs a separate programmer to copy the calibration data, or a pre-programmed “diagnostic” screen that mimics the pairing — otherwise it stays off.
Does an “Unknown Part” message mean the screen is bad?
Not by itself. It confirms the part wasn’t Apple-verified, but a quality aftermarket screen triggers the same message and works normally apart from True Tone. It can, however, lower trade-in value and means you should set expectations about colour/brightness accuracy.
*Shopping for a replacement or verifying what’s already on your phone? Browse our phone parts and repair toolkits, and if you’re unsure what grade you need, ask your repairer exactly what panel they fit.*
Related reading
- Tools to repair a phone: a South African starter guide
- How to solder: a beginner’s guide
- How to use a multimeter: a beginner’s guide
Disclaimer
POTATOTECH is currently preparing its online store. Product names, specifications, pricing, stock levels and delivery options mentioned or linked above are indicative and subject to change. For the latest availability, specifications or shipping details, please contact support@potatotech.co.za. Nothing in this article constitutes a purchase offer or a commitment to supply.
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