iPhone Duo Specs
Every official iPhone Duo specification in one table — dimensions, display, chip, cameras, battery, connectivity, and build — plus what the numbers mean in everyday use.
Data last updated September 10, 2026 · Specs from Apple.com iPhone Duo specs · Market prices are not stored on this page; check live listings before deciding
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 | 164.6 × 117.8 × 5.2 mm |
| Frame / back | Titanium foldable / Ceramic Shield 2 front and back |
| Water resistance | IP68 |
| Colors | Star White, Night Sky |
| Display | |
| Size | 7.6-inch inner / 5.4-inch outer OLED (Super Retina XDR) |
| Resolution | 1878 × 2670 inner (430 ppi) / 1398 × 2034 outer (460 ppi) |
| Refresh rate | ProMotion 120Hz (both displays) |
| Brightness | 1000 nits typical; 3000 nits peak (outdoor) |
| Always-on | Yes (both displays) |
| Front cameras | 12MP Center Stage (outer); under-display (inner) |
| Performance | |
| Chip | A20 Pro (6-core CPU, 7-core GPU) |
| Storage | 256 / 512 / 1024 / 2048 GB |
| Apple Intelligence | Supported |
| Camera | |
| Rear system | 48MP Dual Fusion: main (ƒ/1.6, 2× optical-quality crop) + ultrawide |
| Telephoto lens | No dedicated telephoto |
| Max video | 4K Dolby Vision at 120fps (main) |
| LiDAR | No |
| Fold features | Duo Preview, Split View, Smart Take |
| Battery & charging | |
| Video playback | up to 44 h (outer) / 31 h (inner) |
| Wired charging | 60W capable (USB-C) |
| MagSafe | Yes, 25W |
| Connectivity & features | |
| 5G / Wi-Fi / Bluetooth | 5G, WiFi 7, Bluetooth 6.0 |
| Port | USB-C |
| Biometrics | Touch ID (side button) |
| Other | Crash Detection (no Action Button), satellite SOS |
| Pricing | |
| Launch price (256GB) | $1,999 (2026) |
| 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.