IPHONE DUO / Hardware

iPhone Duo specifications, with the important limits

The direct answer

iPhone Duo combines A20 Pro, a 7.6-inch folding display, a 5.4-inch outer display and Touch ID in the side button. The fact table links the hardware claims to official sources. Manufacturer specifications are not independent performance or reliability results.

Officially confirmedLast checked Official sources
Inner display · inches
7.6
Outer display · inches
5.4
Chip
A20 Pro
Weight · g
254
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Two display diagonals
Original PhoneHelp diagram · not a product photograph

Read a specification as a defined claim

A display diagonal does not tell you how much of a document fits beside another app. Peak brightness is not a promise of sustained brightness in every task. Video playback duration is not a prediction for navigation, gaming or weak-signal use. The meaning of a number depends on the conditions attached to it.

Use the individual display, battery and charging guides for those conditions. Keeping the qualifications close to a fact is more useful than collecting the largest numbers in one table.

Look for connections between the specifications

Weight, closed depth and open width describe different parts of portability. Storage and camera settings interact when keeping large recordings offline. eSIM-only hardware makes carrier compatibility part of the purchase decision rather than an optional setup detail.

  • Compare open and closed measurements, not just thickness.
  • Keep inner-display and outer-display battery modes separate.
  • Check planned software features against regional availability.

What is deliberately absent

There is no invented PhoneHelp benchmark, hinge-cycle result, repairability score or reliability rating here. Nor do we infer an unlisted specification from another iPhone with the same chip. Shared component branding does not establish that every implementation is identical.

The registry stores volatile facts once so corrections can propagate to pages and visuals. If an official source is ambiguous, the omission or qualification should remain visible rather than being filled with an attractive guess.

At a glance · Apple / Official sources
Inner display · inches7.6[A-US-SPEC-001]
Outer display · inches5.4[A-US-SPEC-001]
ChipA20 Pro[A-US-SPEC-001]
Weight · g254[A-US-SPEC-001]
Storage256GB / 512GB / 1TB / 2TB[A-US-SPEC-001]
Main · MP48[A-US-SPEC-001]
Ultra Wide · MP48[A-US-SPEC-001]
Laboratory resistance ratingIP68[A-US-SPEC-001]
SIM and carrier scopeeSIM only; carrier and plan support required[A-US-BUY-001]
Planned shipping softwareiOS 27.1[A-US-NEWS-001]
AuthenticationTouch ID in the side button[A-US-PROD-001]

Sources & verification

  1. iPhone Duo - Apple Apple · en-US · Last checked September 10, 2026A-US-PROD-001
  2. iPhone Duo - Technical Specifications - Apple Apple · en-US · Last checked September 10, 2026A-US-SPEC-001
  3. Shop iPhone Duo — United States Apple · en-US · Last checked September 10, 2026A-US-BUY-001
  4. Apple unveils iPhone Duo - Apple Apple · en-US · Last checked September 10, 2026A-US-NEWS-001

Source-based coverage. PhoneHelp has not hands-on tested a retail iPhone Duo.