region-based modem – Leaked Tata cyberattack documents suggest Apple’s iPhone 18 Pro may not use a single modem everywhere. U.S. models appear to rely on Qualcomm hardware for mmWave, while iPhone 18 Pro models sold elsewhere point to Apple’s in-house C2 modem. The same leak set a
For Apple, the iPhone 18 Pro’s biggest change may not be visible on the outside. It’s the cellular connection itself—potentially split by region, and shaped by the kind of modem hardware Apple can (and can’t) ship.
The story starts with the aftermath of a cyberattack on Tata. On June 25. AppleInsider reported exclusively that iPhone 18 Pro schematics and documents were among more than 630GB of files taken from Tata. Among that material. new analysis points to a modem plan that isn’t as clean-cut as it might sound at first.
The leaked documentation suggests Apple may use a region-based modem approach and a split release: some iPhone 18 Pro models could use Apple’s proprietary C2 modem. while others use Qualcomm modem hardware. It’s also not clear that the “Air” strategy—where all iPhone Air models use an Apple-designed modem—will carry over to the iPhone 18 Pro.
For the U.S. iPhone 18 Pro, which will feature mmWave compatibility, the documents point toward Qualcomm modem hardware. A bill of materials tied to the iPhone 18 Pro model Apple plans to sell in the United States references multiple Qualcomm components. including SDX80M. SDR875. QDM8771. QDM8720. PMK75. PMX75. and QET7100A.
Elsewhere, Tata documentation suggests the iPhone 18 Pro could lean on Apple’s C2 modem. That sounds unusual, especially alongside the apparent U.S. reliance on Qualcomm—but the leak set offers one possible explanation. Apple’s current in-house modems, C1 and C1X, do not support 5G mmWave. If C2 follows that limitation. Apple may offer mmWave in the iPhone 18 Pro by using Qualcomm hardware until it develops an mmWave-capable in-house modem.
The iPhone 17 lineup already shows how messy this can get. With iPhone 17. iPhone 17 Pro. and iPhone 17 Pro Max. Apple uses Qualcomm hardware. while the iPhone Air and iPhone 17e rely on Apple-designed modems. The iPhone 18 Pro appears to be moving that mixed pattern one step further—this time with region driving the cellular hardware.
Board schematics tied to iPhone 18 Pro hardware reinforce the possibility. Two separate part numbers and two logic board variants appear to exist. One, 820-04340-06, corresponds to the iPhone 18 Pro logic board with a mmWave connector and Qualcomm modem hardware. The non-mmWave iPhone 18 Pro logic board carries part number 820-04305-06.
Cellular features by region could also extend beyond modems. With the current iPhone 17 lineup. models sold in mainland China do not use eSIM and instead support two physical SIM cards. Tata documentation suggests iPhone 18 Pro models sold in China might gain eSIM support. One region-based configuration list reads, “No more dual PSIM starting in V64 P2,” up to the Proto2 stage of development. The document directly mentions eSIM and physical SIM support for a configuration labeled CN, which likely refers to mainland China.
Behind the scenes, those modem decisions connect to another part of the leak set: the A20 Pro chip.
AppleInsider originally pointed out that some of the Tata files included documents about the upcoming A20 Pro chip, codenamed Borneo. Further analysis of the leaked material—again. from the larger set of more than 630GB—suggests Apple is considering a WMCM-style package for the A20 Pro system-on-chip. The AP and memory would sit side-by-side, unlike the standard InFO-PoP packaging.
WMCM stands for Wafer-Level Multi-Chip Module, while InFo-PoP stands for Integrated Fan-Out Package-on-Package. The leak analysis describes key differences between the approaches. With InFo, Apple uses a single die housing the CPU, GPU, and the Neural Engine, with limited memory configurations. Memory is added to the chip package rather than remaining external. With WMCM, the documents suggest Apple could use separate dies for the CPU, the GPU, and the Neural Engine. That would let Apple mix and match combinations of each, potentially increasing the number of chip configurations available to consumers.
Rumors about Apple using WMCM date back to at least August 2025, and Tata’s files appear to corroborate those claims, at least for the A20 Pro packaging direction.
The schematics also hint at physical layout changes. Some iPhone 18 Pro board schematics suggest the system-on-chip would move closer to the outer edge of the dual-layer board. while storage would sit deeper between the two board layers. The documents say the outcome could affect thermal performance and repairability, though the exact impact remains uncertain.
The leak set even reaches the camera hardware. Diagnostic data comparing the iPhone 17 Pro to the iPhone 18 Pro shows the ID of the Wide sensor changes from 0x903 to 0x905. That shift likely indicates the main rear camera of the iPhone 18 Pro could change.
The iPhone 17 Pro’s wide or main camera uses the Sony IMX-903 image sensor. The findings point to the iPhone 18 Pro using the Sony IMX-905, described as a new custom-made image sensor.
Other rumors—spanning October 2025, February 2026, and April 2026—claim the iPhone 18 Pro could get a rear camera with a variable aperture. If that makes it into the final design, a variable aperture would reduce the need for computational photography to create bokeh effects.
One last detail complicates certainty. The Tata documents appear to describe prototype hardware in various stages of development, and it’s still unclear whether the schematics are final or interim.
Even so, the modem picture that emerges is already specific: Qualcomm hardware in the U.S. for mmWave, Apple’s C2 modem suggested for other markets, and distinct logic board variants marked by part numbers. For iPhone 18 Pro buyers. that could mean the same model name—but not necessarily the same cellular engine—depending on where they live.
iPhone 18 Pro Tata cyberattack Apple C2 modem Qualcomm modem mmWave SDX80M SDR875 A20 Pro Borneo WMCM packaging InFO-PoP IMX-905 variable aperture eSIM China 820-04340-06 820-04305-06
So they’re making different iPhones for different places? Cool I guess.
MmWave vs whatever C2 is… I don’t even know what my phone has half the time lol. If this is real then great, another thing to confuse customers by region.
This reads like the Tata hack is why Apple can’t source one modem and then they blame “regions.” Like wait, so the iPhone 18 Pro in the US is gonna be worse because it uses Qualcomm? Seems backwards but idk.
I don’t trust leaked docs after a cyberattack. Probably just rumors to panic people. Also “split release” sounds like some models get features and others don’t, and they’ll act like it’s normal. If Apple has their own C2 modem why isn’t it in all of them, like ever?