Apple Downgrades iPhone 18 Pro 1TB and 2TB Storage as Prices Rise to $1,499

Q: Why might the cheaper iPhone 18 Pro model actually outperform the most expensive one?

Yes. The cheaper iPhone 18 Pro could be faster in storage-heavy tasks because reports say Apple will keep **TLC NAND** in the 256GB and 512GB models, while shifting many **1TB and 2TB** versions to **QLC NAND**. That matters because TLC flash is generally **faster and more durable** than QLC. QLC stores more bits per cell, which lowers Apple’s cost per gigabyte, but it usually brings **slower write speeds, weaker random 4K performance, and lower endurance**. The reported 2TB chip, SK hynix’s BC8Q-2T, is described as having especially poor random performance, which can affect app behavior, file handling, caching, and other storage-dependent tasks. In practice, that means a lower-priced 256GB or 512GB iPhone 18 Pro could feel quicker than a top-tier 1TB or 2TB model when recording large video files, transferring data, installing apps, or handling sustained workloads after cache fills. Over time, the durability gap may also matter, since TLC typically supports more write cycles than QLC. The processor and RAM are still expected to be the same across the Pro lineup, so this is not about the cheaper phone having a better chip. It is about the **storage subsystem**. If these reports are accurate, the most expensive model may offer more capacity, but the cheaper one may deliver **better storage performance and longevity**.

1 articles · Updated · Wccftech · Jul 2

1TB and 2TB iPhone 18 Pro models will reportedly switch from TLC to slower QLC NAND, a change that could hurt write speeds and durability on Apple’s highest-capacity variants.
256GB and 512GB versions are said to keep TLC chips from SK hynix, Kioxia and SanDisk, making the lower-capacity models relatively more attractive despite the Pro line’s premium positioning.
The 1TB model is reportedly using SK hynix BC8Q-1T QLC with Samsung TLC only as a rare alternative, while the 2TB version uses SK hynix BC8Q-2T QLC described as an enterprise design with weak random 4K performance.
The shift comes as Apple is expected to raise base iPhone 18 Pro and Pro Max prices to $1,399 and $1,499, even though flash storage cost on the 256GB Pro is reported to jump to $51 per unit from $13 on the iPhone 17 Pro.