Apple is reportedly trying to secure long-term NAND flash storage for the iPhone 18 Pro as memory costs come under pressure. The reported agreement has not been confirmed by Apple, and Kioxia is only considered the likely counterparty; its volume, pricing and other terms remain undisclosed.
That distinction matters because the rumor cycle has bundled several different claims together: a supply agreement, a projected jump in component costs, possible changes to the phone’s retail price and an unconfirmed split between TLC and QLC storage. They are not the same thing.
Apple’s reported NAND agreement is not a confirmed Kioxia contract
The reported deal concerns NAND, the nonvolatile flash memory used for a phone’s built-in storage. It is where apps, photos, videos and other files remain saved when the device is turned off. DRAM is different: it is the faster working memory used by the operating system and apps while they are running.
Apple is reported to have signed a long-term NAND supply agreement, but the available account does not identify the supplier as a confirmed fact. Market watchers have pointed to Kioxia as the likely partner. The agreement’s volume, price formula, duration and any price-cap terms have not been established.
So the useful takeaway is narrower than “Apple signed with Kioxia”: Apple is reportedly seeking more predictable access to storage memory during a difficult market, while the identity and terms of the arrangement remain uncertain.
The nearly 400% figure is not a 400% iPhone price increase
The most eye-catching number applies to a specific component estimate. Memory costs for a 256GB iPhone 18 Pro could be nearly 400% higher year over year in Q3 2026, according to a market forecast. That describes the projected cost of memory used in the device—not the retail price of the phone.
A component-cost percentage cannot be converted directly into a store price. The result would also depend on Apple’s pricing decisions, margins, distribution costs, taxes and the cost of every other component. A separate forecast puts a possible increase for new iPhone models at roughly 10% to 20%, but that remains an estimate rather than an official Apple price.
Third-party bill-of-materials estimates offer another indication of the pressure: NAND for a 1TB iPhone 18 Pro Max has been estimated at more than $250 per unit, with NAND and DRAM together near $400. Those figures are estimates of component costs, not Apple disclosures or US retail prices.
In plain English: expensive NAND could put pressure on the iPhone’s price, but it does not tell us that the phone will cost four times as much—or that the increase will be a fixed dollar amount.
What storage configuration is actually reported?
A report says the iPhone 18 Pro may start with 256GB of storage. That capacity is not confirmed by Apple. Other reported tiers include 512GB, 1TB and 2TB, but those options also remain unconfirmed.
A separate rumor claims that 256GB and 512GB models could use TLC NAND, while 1TB and 2TB versions could use QLC NAND. Again, this is not an official specification. A similar earlier storage rumor reportedly did not match later observed hardware, so treating the split as settled would be premature.
The technical difference is real even if its application to the iPhone 18 Pro is not. TLC stores three bits per memory cell; QLC stores four. QLC can provide greater density, which is useful for larger capacities, while TLC is generally associated with higher performance and endurance .
| NAND type | Bits stored per cell | General trade-off | Possible relevance to the iPhone 18 Pro |
| TLC | 3 | Generally higher performance and endurance | Reported as a possibility for 256GB and 512GB models |
| QLC | 4 | Greater density, with potentially lower performance and endurance | Reported as a possibility for 1TB and 2TB models |
The table describes the technology, not confirmed iPhone 18 Pro hardware. The phone’s exact NAND supplier, type and configuration remain unsettled.
The same applies to RAM. The available reporting does not establish that the iPhone 18 Pro will have 16GB of RAM. NAND storage and DRAM system memory are separate components, so a story about rising NAND costs is not evidence of a particular RAM capacity.
A repair demonstration shows NAND work on a marked board
A repair demonstration shows a NAND chip being removed, cleaned, reballed and resoldered on a logic board and stencil marked “IP18Pro/Pro Max.” That makes the hardware discussion more tangible: NAND is a physical storage component that can be serviced at board level, not an abstract line item in a supply-chain report.
But the marking does not establish that the board is final-production Apple hardware, nor that its configuration represents every iPhone 18 Pro or iPhone 18 Pro Max model. It also does not confirm a supplier, storage tier or retail design. The observation is useful context, not an official specification.
What this means for buyers before launch
For anyone considering the iPhone 18 Pro, the practical reading is straightforward:
- Do not treat Kioxia as a confirmed Apple supplier.
- Do not turn the nearly 400% memory-cost projection into a 400% retail-price forecast.
- Treat 256GB as a reported possible starting capacity, not an official specification.
- Treat the TLC and QLC allocation as a rumor, especially for the high-capacity models.
- Do not assume a 16GB RAM configuration from reports about NAND storage.
- Treat estimates of up to $1,399 for the iPhone 18 Pro and $1,499 for the iPhone 18 Pro Max as reported US estimates, not official prices.
The central story is supply and cost pressure around storage memory—not a confirmed NAND defect in the iPhone 18 Pro. Until Apple publishes final specifications and pricing, the meaningful question is not whether one rumor sounds dramatic. It is whether the reported memory pressure eventually appears in the phone’s configuration and the price on the shelf.
