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iPhone 18 Pro Max AT&T models failing at launch: hardware replacement required

A hardware flaw in U.S.-only iPhone 18 Pro Max units breaks AT&T cellular service — and Apple says software can’t fix it.

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By Pocket

The Mobile Desk · (5 Oct 2026)

Reported fromoutlets, credited6
iPhone 18 Pro Max front view showing Dynamic Island and camera bump
iPhone 18 Pro Max front view showing Dynamic Island and camera bumpPhoto via GSMArena

Apple has confirmed a hardware-level cellular failure affecting some iPhone 18 Pro Max units on AT&T’s network — and it cannot be fixed with software. Affected devices lose all cellular functionality: no calls, no texts, no data. IOS 27.0.1 and a carrier settings update released last week only prevent the issue.

They do not restore service to already-broken phones. Users must visit an Apple Store or AT&T retail location for a full hardware replacement. Apple says the problem impacts a 'small number' of units, though thousands have reported it across support forums. No other iPhone model or carrier is involved.

The flaw appears exclusive to U.S.-sold iPhone 18 Pro Max units, which use Qualcomm’s Snapdragon X80 modem. All other global variants. Including the iPhone 18 Pro and iPhone 18 Duo, ship with Apple’s in-house C2 modem and are unaffected. AT&T confirmed it’s working with Apple but declined to specify the root cause.

Neither company has disclosed whether the issue stems from the modem itself, its integration, or a related RF component. Apple has not issued a recall or extended warranty coverage beyond standard repair terms. The fix remains reactive: replace the phone. No timeline for resolution has been shared.

Meanwhile, the iPhone 18 Pro Max continues shipping globally. With no changes to pricing, specs, or availability outside this isolated hardware defect. The device launched at $1,399 in the U.S., ₹1,59,900 in India, and €1,499 in Germany. It goes on sale in Japan and Australia next week.

Where to buy · 2 products

Paid links. As an Amazon Associate, Hitechreports earns from qualifying purchases. Prices change; the story gives the price as reported when it was written.

Topicshardware-failureapplecellular-issueattqualcommiphone-18-pro-max

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How this story was made

Written by the Hitechreports desk from the reporting credited above, with facts attributed to their original publishers. We do not test devices ourselves; anything about performance, battery life or cameras comes from the outlets that did. Prices are as reported at the time of writing. Editorial policy · Report an error

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Filed by The Mobile Desk

Phones from leak to launch to price cut: what was announced, what it costs where, and when it goes on sale. Indian launches and prices included, not appended.

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