Apple is testing memory chips from the Chinese manufacturer CXMT for future devices, but their inclusion in the iPhone 18 Pro and iPhone 18 Pro Max seems unlikely. A new leak attributes this limitation to the WMCM packaging of the A20 Pro processor, which would require much tighter technical coordination between chip design and memory. Samsung and SK Hynix have an advantage due to their history as Apple’s long-standing suppliers, although the American company has not confirmed any of these plans.
Key points about the iPhone 18 Pro memory in 20 seconds
- CXMT is being evaluated: Apple has reportedly started testing DRAM memory from the Chinese manufacturer for devices initially destined for the Chinese market.
- Pro models are excluded: Rumors indicate that CXMT is unlikely to supply memory for the iPhone 18 Pro.
- The reason is technical: The A20 Pro would feature WMCM packaging that integrates the processor and DRAM more closely.
- Samsung and SK Hynix have the lead: Both have years of working with Apple and may have participated earlier in validating the new packaging.
- No official decision: Apple has not announced the A20 Pro, its architecture, or the memory suppliers for upcoming iPhones.
- CXMT still has options: Its chips could appear in models with the standard A20, in other Apple products, or in devices sold only in China.
- The geopolitical aspect remains: CXMT is listed by the Pentagon due to alleged ties with the Chinese Army, though the leak suggests initial exclusion was based on engineering reasons.
This information comes from Fixed Focus Digital, a Weibo account claiming that Apple is unlikely to incorporate CXMT memory in its upcoming professional phones. According to the leak, the design of the A20 Pro has already been prepared around components supplied by Samsung and SK Hynix, both well-acquainted with Apple’s validation processes.
This should be treated as a supply chain rumor. Apple typically doesn’t disclose which company makes each component before launch and often uses equivalent parts from multiple suppliers within a generation.
However, it is more certain that Apple has shown interest in CXMT. The Financial Times reported in July 2026 that the company was testing memory from the Chinese manufacturer for devices sold in China. This move would help expand its supply network amid rising DRAM prices and high demand from data centers for AI applications.
Why WMCM packaging complicates involving a new supplier
Current mobile processors typically use Package-on-Package (PoP) designs. In this architecture, the application processor and memory are in separate packages stacked vertically, saving space within the phone and allowing chip and memory combinations from different vendors as long as they meet Apple’s electrical and thermal specifications.
The A20 Pro would take a different approach. Multiple analyst reports suggest it will use TSMC’s 2-nanometer manufacturing process and WMCM (Wafer-Level Multi-Chip Module) packaging. This technology places several components within a single set and reduces the distance between the processor and memory.
This change could enhance bandwidth, energy efficiency, and thermal management during intensive loads. It would also free up space inside the device for other components, although actual benefits won’t be confirmed until a commercial product exists and its packaging can be examined.
The downside is that memory becomes less independent. The supplier must collaborate early with Apple and TSMC to fine-tune parameters such as chip size, connection layout, signal integrity, power consumption, thermal dissipation, and assembly process.
Each combination needs to pass performance, reliability, temperature, and high-volume manufacturing tests. A module functioning correctly in a PoP architecture can’t simply be swapped into a WMCM design without adjustments.
This integration explains Samsung and SK Hynix’s advantage—they have longstanding relationships with Apple and experience in high-performance mobile memory, advanced packaging, and joint validation with processor manufacturers.
Samsung, which develops its own Exynos chips and can coordinate processor, memory, and packaging manufacturing internally, benefits from this experience. While it’s not guaranteed Samsung will secure all iPhone 18 Pro orders, its understanding of tolerances and integration requirements is an advantage.
Similarly, SK Hynix has become a key player in AI memory demand, excelling in HBM and low-power DRAM. Apple typically distributes its memory procurement among multiple suppliers to reduce dependency and improve bargaining power.
Rumors suggest the iPhone 18 Pro and Pro Max could feature a 2nm A20 Pro, WMCM packaging, and 12GB of memory. None of these specs have been confirmed by Apple and may change before the scheduled launch in the second half of 2026.
CXMT’s growing influence in a market dominated by three manufacturers
ChangXin Memory Technologies has become China’s leading DRAM manufacturer and the fourth largest globally by capacity. Its expansion threatens to disrupt a market long controlled by Samsung, SK Hynix, and Micron.
Apple might have reasons to add CXMT to its supplier list. Introducing a fourth contender could reduce supply disruptions and strengthen Cupertino’s bargaining power, especially during shortages.
Demand for memory for AI servers is increasingly consuming global production. Manufacturers prioritize components with higher margins, like HBM used with GPUs, while DRAM for smartphones, PCs, and tablets is also becoming more expensive.
Apple makes large-volume purchases and usually signs contracts well in advance. Relying on just three suppliers in a tight market involves risks. Testing with CXMT could be part of a medium-term diversification strategy, even if initial chips don’t appear in the most advanced models.
CXMT reports improvements in LPDDR5X production, a low-power memory type used in high-end mobile devices. Still, entering Apple’s supply chain demands consistent quality across millions of units, high manufacturing yields, and the capacity to supply large volumes over several years.
WMCM integration adds further complexity. While Samsung and SK Hynix have more experience with the A20 Pro, swapping one component late in development could increase delays and invalidate validation tests.
Thus, a more plausible plan might involve starting with less demanding products or different packaging. The Chinese source suggests CXMT retains options for devices that don’t use the A20 Pro—possibly a future standard iPhone, a budget model successor, or variants for the Chinese market.
Apple is also reportedly planning a staggered release schedule for the iPhone 18 family—Pro models and a possible foldable could launch in 2026, with standard versions delayed until 2027. This strategy has not been officially confirmed.
Using CXMT memory only in products sold in China would test market performance without fully integrating the component into the global supply chain. Apple already offers regional versions with differences in connectivity, SIM slots, and some software features.
Technical hurdles don’t eliminate political conflicts
The new leak emphasizes that CXMT’s exclusion from the iPhone 18 Pro is due to the packaging of the A20 Pro and not political considerations. However, both factors can coexist.
CXMT appears on the US Department of Defense’s list 1260H, which catalogs companies linked to the People’s Liberation Army. Being on the list doesn’t automatically prevent Apple from purchasing its products but raises reputational risks and potential future restrictions.
Apple reportedly sought clarity or support from the US government before proceeding with CXMT. Some lawmakers have publicly criticized a possible collaboration, as the company attempts to secure more memory amid rising prices.
Even if CXMT passes technical evaluations, Apple must decide if cost savings and diversification outweigh regulatory uncertainties. Adding the supplier later could limit the Chinese manufacturer’s access to foreign equipment and threaten supply continuity.
Focusing only on models intended for China could mitigate some risks but not eliminate them. Apple would still be purchasing components from a company under US scrutiny, requiring separate inventories, manufacturing processes, and repair strategies by market.
The most probable scenario is gradual: Samsung, SK Hynix, and possibly Micron will continue to play major roles in high-end models, while CXMT works to meet validation requirements for other devices.
Excluding CXMT from the iPhone 18 Pro doesn’t mean the partnership has failed. Apple takes years to qualify new suppliers and might begin with small volumes before expanding. The focus on CXMT indicates that memory is now a strategic decision, not just a component choice.
Confirmation will come once new iPhones are released and hardware analyses reveal component origins. Until then, Samsung and SK Hynix’s advantages seem plausible due to the packaging complexity, but this remains unofficial information.
Frequently Asked Questions
Will the iPhone 18 Pro use CXMT memory?
A leak from Weibo suggests very low likelihood. Apple has not confirmed any DRAM suppliers for the device.
What is the WMCM packaging of the A20 Pro?
It’s a technology that integrates the processor and other components, including memory, within a single wafer-level encapsulation. It can improve efficiency but requires stricter validation among manufacturers.
Why do Samsung and SK Hynix have an advantage?
They have supplied memory to Apple for years and participated earlier in the development and testing of the A20 Pro’s new packaging.
Could CXMT appear in other iPhones?
Yes. The leak leaves open the possibility of inclusion in models with the standard A20, other Apple devices, or China-specific models, provided they pass technical tests and navigate regulatory hurdles.
via: Weibo
