Compatibility
iPhone Duo
iPhone Duo shipped with iOS 27.1 and was released on October 23, 2026. The newest software it can install is iOS 27.2 beta.
Shipped with
iOS 27.1
Updates to
iOS 27.2 beta
- Released
- October 23, 2026
- Chip
- A20 Pro
- Identifier
- iPhone19,4
- Colors
Frequently asked questions
What iOS version does iPhone Duo support?
iPhone Duo can update to iOS 27.2 beta. That is the newest version Apple offers for this model.
What version did iPhone Duo come with?
iPhone Duo shipped with iOS 27.1.
Which chip is in the iPhone Duo?
iPhone Duo uses the A20 Pro chip.
What is the model identifier of iPhone Duo?
The model identifier is iPhone19,4. You can match it against the Model Number shown in Settings → General → About.
Running the beta on this device
If iPhone Duo is still on Apple's compatibility list, you can install the current beta on it. Check Supported Devices to confirm, then follow our install guides. Devices that no longer receive major updates stay on iOS 27.2 beta.
Thinking of upgrading?
Wondering whether it's a good time to replace your iPhone Duo? The Buyer's Guide shows how long Apple's current models have been on sale and how long previous ones lasted, so you can tell whether to buy now or wait.