iPhone Duo Specs
Last updated
Every official iPhone Duo specification in one table — dimensions, display, chip, cameras, battery, connectivity, and build — plus what the numbers mean in everyday use.
Specs from Apple.com iPhone Duo specs · Market prices are not stored on this page; check live listings before deciding
Size
iPhone Duo size, folded
- Height
- 117.8 mm4.64 in
- Width
- 84.1 mm3.31 in
- Depth
- 11.3 mm0.44 in
- Weight
- 254 gfolded
- Screen
- 5.4"outer
Weight among iPhones we track
At 84.1 mm wide, this is a two-handed phone for most people. Folded depth is 11.3 mm — thicker than any slab iPhone. 254 g — the heaviest iPhone we list.
Pick a comparison to overlay it at 2 px per mm — the same scale as the size tool. Front and side outlines are schematic; camera bumps are not modelled. Open the size comparison tool for any pair. Both states at one scale are in folded and open. The Pro Max comparison is on the Duo size comparison. Dimensions from Apple.
Same scale
Folded, the Duo is 45.6 mm shorter than the 18 Pro Max
Open, the Duo is 164.6 mm wide and 5.2 mm thick. That width is 1.2 mm past the 18 Pro Max height. Folded width is 1.5 mm inside a credit card.
Weight stays 254 g folded or open. The 18 Pro Max is 249 g. The 17 Pro Max is the same 163.4 × 78 mm body, 8.75 mm thick, at 233 g.
Front outlines share one scale, 1.55 pixels per millimetre. The dashed mark is a credit card 85.6 mm wide. Camera bumps are not drawn. Dimensions from Apple’s iPhone Duo specs. Duo size comparison. Overlay any pair in the size comparison tool.
iPhone Duo full specifications
Official figures, grouped. Dimensions in millimetres, weight in grams.
| Dimensions & build | |
|---|---|
| Height | 117.8 mm |
| Width | 84.1 mm |
| Depth | 11.3 mm |
| Weight | 254 g |
| Open size | 117.8 × 164.6 × 5.2 mm |
| Frame / back | titanium / Ceramic Shield |
| Water resistance | IP68; IP68: maximum depth of 6 m up to 30 minutes under IEC 60529 |
| Colors | Star White, Night Sky |
| Display | |
| Size | 7.6-inch OLED inner / 5.4-inch outer |
| Resolution | 1878x2670 (430 ppi); cover 1398x2034 (460 ppi) |
| Refresh rate | 120Hz ProMotion |
| Brightness | 1,000 nits typical; 1,600 nits peak HDR; 3,000 nits peak outdoors |
| HDR display | Yes |
| True Tone | Yes |
| Always-on | Yes |
| Notch | Dynamic Island |
| Performance & software | |
| Chip | A20 Pro; 6-core CPU, 7-core GPU, 32-core Neural Engine |
| Storage | 256 GB · 512 GB · 1 TB · 2 TB |
| Apple Intelligence | Yes |
| Camera | |
| Main | 48MP, f/1.6, OIS |
| Ultrawide | 48MP, f/2.2, 120° field of view |
| Telephoto | No dedicated telephoto |
| Front | 12MP Outer: 12MP Center Stage, f/2.2; inner: under-display FaceTime camera, f/1.8 |
| Max video | 4K/120fps |
| LiDAR | No |
| Night mode | Yes |
| Camera Control | Yes |
| Action Button | No |
| Front cameras | Outer: 12MP Center Stage, f/2.2; inner: under-display FaceTime camera, f/1.8 |
| Rear system | 48MP Dual Fusion: main (f/1.6, 2x optical-quality crop) + ultrawide |
| Telephoto lens | No dedicated telephoto |
| Fold features | Duo Preview, Split View, Smart Take |
| Battery & charging | |
| Video playback | Up to 44 hours; 44 h outer / 31 h inner |
| Streamed video | Up to 37 hours |
| Audio playback | Not published |
| Fast charging | Up to 50% in around 20 minutes with a 60W-capable USB-C adapter or higher; or around 30 minutes with a 35W adapter or higher paired with MagSafe. |
| Apple fast-charge adapter requirement | 60W-or-higher adapter for Apple's fast-charge claim; maximum device draw not published |
| MagSafe / Qi2 | Yes, 25W |
| Qi | Wireless charging up to 25W |
| Connectivity & features | |
| 5G / Wi-Fi / Bluetooth | 5G, WiFi 7, Bluetooth 6.0 |
| Port | USB-C (USB 3, up to 10Gb/s) |
| Biometrics | Touch ID (side button) |
| Other | satellite SOS, Crash Detection, Camera Control, satellite services; no Action Button |
| Apple lineup status | In Apple's current lineup, checked 2026-09-14 |
| Pricing | |
| Launch price (base storage) | $1,999 |
Refurbished market: Check live graded listings
What the specs mean in daily use
Folded, the Duo is 84.1 mm wide and 254 g — wider and heavier than any slab iPhone, including Pro Max models. The trade-off is a 5.4-inch outer screen for quick tasks and a 7.6-inch inner panel when unfolded to 5.2 mm thick. Both OLED displays get ProMotion 120Hz and always-on.
Authentication uses Touch ID in the side button, not Face ID. The rear system pairs a 48MP main (with a 2× optical-quality crop) and a 48MP ultrawide — no dedicated telephoto. Fold-specific camera features include Duo Preview and Dual Capture. The outer screen has a 12MP Center Stage camera; the inner display uses an under-display FaceTime camera.
Battery ratings depend on which display you use: up to 44 hours video on the outer screen, 31 hours on the inner. Apple lists 60W-capable USB-C fast charging and 25W MagSafe. The Duo is IP68 rated and supports Apple Pencil (USB-C). Pre-orders open October 16; ships October 23, 2026.
iPhone Duo: buy, sell & compare
iPhone Duo specs FAQ
What are the dimensions of the iPhone Duo?
Folded: 117.8 mm × 84.1 mm × 11.3 mm, 254 g. Open: 164.6 mm × 117.8 mm × 5.2 mm. The outer screen is 5.4 inches; the inner screen is 7.6 inches.
What chip and battery does it have?
A20 Pro (6-core CPU, 7-core GPU). Up to 44 hours video on the outer display, 31 hours on the inner. Fast charge to about 50% in 20 minutes with a 60W-capable USB-C adapter.
What is the screen size, resolution, and does it have ProMotion?
Inner: 7.6-inch at 1878×2670 (430 ppi). Outer: 5.4-inch at 1398×2034 (460 ppi). Both have ProMotion 120Hz, always-on display, and up to 3000 nits peak outdoor brightness.
How much storage does it come in and what is the price?
256GB, 512GB, 1TB, and 2TB. Launched at $1,999 (256GB); check live graded listings for current refurbished availability and warranty terms.
Thinking about the iPhone Duo?
Compare live refurbished listings by grade, storage, warranty, and return policy, or see how it stacks up against the models around it.