iPhone Duo: A Bundle of Defects Right After Launch?

3-Line TL;DR

In the first weekend after the Oct 23 launch, about ten photos showed iPhone Duo screens cracked along the fold
Assembly worries like gaps and creaks rest on a few photos, and nobody knows the real defect rate
The Duo gets a lot right, but on long-term foldable durability, Galaxy's earlier trial and error is still an edge (author's opinion)

Apple's first foldable launched Oct 23 in markets including South Korea, starting at $1,999 in the US (Apple Newsroom)
As a market example, the 256GB model costs ₩3.29 million in South Korea
The biggest issue is cracking: a line along the fold with a band of white pixels beside it (9to5Mac)
9to5Mac had seen about ten unique cases by Oct 25, all looking almost identical
One Australian buyer says the screen cracked after about six hours and fewer than 20 folds (Reddit)
Several owners describe the hinge tightening and then a pop just before the crack
On the other hand, seven Genius Bars that AppleInsider asked saw only one such repair over two days (AppleInsider)
Some posts call the assembly odd: a gap when closed, hinge alignment, creaking (Reddit)
These are one or two photos or videos each, with no measurements or official ruling yet

Table sorting six complaints about the iPhone Duo by what was seen, context and spread: cracks have several reports, assembly worries are unconfirmed

In JerryRigEverything's test, the inner screen scratched at Mohs level 2 (MacRumors)
After dust went in, the hinge stopped closing fully, and a reverse bend left a green line and a dead inner screen
You can watch the screen actually fail in JerryRigEverything's original video

The matte film has only drawn worries that it might peel on its own; no one has reported it actually peeling

Most owners who went to an Apple Store got a new unit on the spot (9to5Mac)
Carrier stores told some buyers to wait for stock, and one case was judged a drop
Apple has announced no cause and no replacement program yet
It did publish a hinge troubleshooting document on launch day (Apple Support)

Apple support doc capture: hinge symptoms, no software fix for hinge issues, and inner display assembly replacement

Source: Apple Support 148323, our own capture of the original text; red outlines added by HSL

It says there's no software fix for hinge issues, and the whole inner display assembly gets replaced if checks fail
From teardown and CT scans, iFixit sees the cracks gathering at the edge of the hinge support structure (iFixit)
It suggests the center support may not drop far enough, but calls that a possibility, not a verdict
Korean YouTuber CuriousHagi took apart a cracked Duo and found a hinge part sheared right where the crack began (video in Korean)
An impact mark under the display suggests the broken piece hit it, though this is one unit (AppleInsider)

Out of warranty, the bill is steep: an inner screen is reported at $999 (iFixit)

Bar chart of US out-of-warranty inner-screen repair: iPhone Duo $999, Galaxy Z Fold8 module $579, screen only $419

With AppleCare+, an inner-screen claim costs $99 (AppleCare fees)
As a market example, South Korean reports put an out-of-warranty inner screen at ₩1.649 million vs ₩774,000 for the Fold8 (Newsis)

At a repair counter, a bandaged foldable lies on a stretcher while a piggy bank faints at a $999 price sign

The piggy bank fainted at $999

In South Korea, iPhones also carry a two-year manufacturing-defect warranty (Apple Korea)

iFixit gives it a provisional 5/10 for repairability, the best of any foldable; the Fold8 got 4/10 (iFixit)
In the same fluorescent powder test, less powder got into its hinge than into the Fold8's
It's rated IP68 for water and dust, above the Fold8's IP48 (Apple Newsroom)
Reviewer Joanna Stern folded it more than 32,000 times by machine, and only the hinge got a little stiffer (MacRumors)
One hands-on found the crease visible in some light but better hidden than Samsung's (MacRumors)

	iPhone Duo	Galaxy Z Fold8
Water and dust	IP68	IP48 (no protection from dust under 1mm)
Inner screen scratches	Mohs 2	Mohs 2
Bend test (JRE)	Inner screen died	Passed (Ultra broke)
iFixit repairability (provisional)	5/10	4/10
US out-of-warranty inner screen	$999 (reported)	$419–$579
Published fold durability	None	500,000 folds (Fold7 panel test)

Samsung delayed the first Galaxy Fold in 2019 after review units' screens broke (Samsung Newsroom)
It blamed impacts at the hinge's top and bottom gaps and debris getting inside
In July it said it had tucked the protective layer under the bezel, added hinge caps and narrowed gaps (Samsung Newsroom)
The fixed Fold went on sale on Sep 6, starting in South Korea

Timeline from the 2019 Galaxy Fold delay, fixes and relaunch through the Fold8 to the iPhone Duo launch and teardown

The Duo's suspected hinge gaps and debris look a lot like what Samsung went through in 2019
Samsung isn't flawless either: a Fold8 crack case and a warranty dispute surfaced soon after launch (Sammy Fans)
Still, seven years of refining hinges, protective layers and repair systems counts for a lot
The Duo clearly has real strengths in repairability, water resistance and the crease
But on durability over years of folding, I think Galaxy, with far more foldable experience, still has the edge (author's opinion)

Duo owner u/leftyhyzer16 reports a cracked screen after roughly four folds and a free replacement at the Dallas Apple Store (Reddit)
Duo owner u/Background_Handle241 asks whether apparent hinge misalignment after two days is normal (no measurements) (Reddit)
Duo owner u/odaboi_ reports that their launch-day 512GB Star White unit works normally without cracks (Reddit)
Fold8 owner u/acatonmars reports a pop and a line on the screen during setup after less than 30 minutes (Reddit)

Q. Should I buy a Duo now?
- The defect rate is still unknown. If you buy, fold it often in the first two weeks and keep the return window and AppleCare+ in mind
Q. Will Apple replace a cracked screen for free?
- Apple Stores mostly swapped units on the spot, but there's no official free program, and a drop verdict means you pay
Q. Can I peel off the matte film?
- Apple says not to. The crease shows more without it, and a US replacement is reported at $49
Q. Does the Fold8 avoid these problems?
- The Fold8 has early failure posts too, and the Ultra broke in a bend test, but it builds on fixes since 2019