Key numbers
| Item | Apple’s listed specification | Why it matters |
|---|---|---|
| Open dimensions | 6.48 in wide × 4.64 in high × 0.21 in deep | The open footprint is closer to a small tablet than a normal slab phone. |
| Closed dimensions | 3.31 in wide × 4.64 in high × 0.44 in deep | The folded body changes pocket fit and case choice. |
| Weight | 8.96 oz / 254 g | Compare this with the phone you carry, not only with other foldables. |
| Displays | 7.6 in inner; 5.4 in outer | Different layouts and tasks can make the two panels feel like separate contexts. |
| Storage | 256 GB, 512 GB, 1 TB, or 2 TB | Capacity is selected at purchase; it is not a later upgrade. |
| Video playback | Up to 31 h inner / 44 h outer | Apple’s claim is not the same as a universal real-world runtime. |
| Typical use | Up to 24 h | Apple’s typical-use claim is separate from its video-playback figures. |
| Charging | Up to 50% in around 20 min wired with a 60W-capable adapter; around 30 min wireless with a 35W adapter and MagSafe Charger | The adapter, cable, charger, temperature, and battery state matter. |
| Wireless | Wi-Fi 7, Bluetooth 6, Thread, and 5G | The radio capability does not guarantee a particular network speed or carrier result. |
| SIM | Dual eSIM; no physical SIM compatibility | Activation and transfer still depend on the carrier. |
Important qualifiers
The dimensions are listed separately for open and closed positions. A case, folio, hinge clearance, and the way you hold the device will change the practical experience.
The phone is eSIM-only according to Apple’s specifications, and Apple lists an IP68 rating under defined conditions. Neither statement should be expanded into a promise about every carrier, repair outcome, or water incident.
Apple separates wired and wireless fast-charge conditions. A listed maximum is not a guarantee that every adapter, cable, case, charger, temperature, or battery state will produce the same result.
Compare safely
For a purchasing decision, start with Duo versus iPhone 18 Pro Max. For a new-owner handoff, use the first-day checklist rather than optimizing around one headline specification.
Confirmed
- Apple lists the inner and outer display sizes, open and closed dimensions, weight, storage tiers, charging standards, and battery playback claims.
- Apple lists Touch ID in the side button and dual eSIM with no physical SIM compatibility.
- Apple lists up to 24 hours of typical use, up to 50% wired charge in around 20 minutes with a 60W-capable adapter, and around 30 minutes wirelessly with a 35W adapter and MagSafe Charger.
- Apple lists Wi-Fi 7, Bluetooth 6, Thread, 5G, MagSafe up to 25W, and Qi2 up to 25W.
Provisional
- Real-world battery life, pocket comfort, crease visibility, and app behavior require independent testing and vary by use.
FAQ
How much does iPhone Duo weigh?
Apple’s specifications list 8.96 ounces, or 254 grams. That is the phone figure before adding a case or folio.
How big is the iPhone Duo screen?
Apple lists a 7.6-inch inner display and a 5.4-inch outer display, each with its own resolution and pixel density.
Does iPhone Duo have a physical SIM tray?
Apple’s specifications say it is not compatible with a physical SIM card and uses dual eSIM.
Sources
- Apple iPhone Duo technical specificationsDimensions, displays, power, cameras, and connectivity.
- Apple iPhone DuoFeature explanations and comparison context.