
Apple has released iOS 11.3 for iPhone and iPad. The final version of iOS 11.3 includes multiple bug fixes, performance improvements, and several new features.
Separately, Apple has released tvOS 11.3 for Apple TV, and watchOS 4.3 for Apple Watch. HomePod also has a 2GB software update available for the speaker system. For Mac users, macOS High Sierra 10.13.4 is available along with Security Update 2018-02 for earlier system software builds.
iOS 11.3 includes bug fixes and enhancements for iPhone and iPad, along with four new Animoji icons for iPhone X, a new Battery Health feature in the Settings app, along with small updates to various default apps like Health.
How to Download & Install iOS 11.3 Update
The easiest way to download and install iOS 11.3 is through the Settings app Software Update mechanism of iOS. Be sure to back up your iPhone or iPad to iCloud or iTunes (or both) before installing any software update.
- Open the “Settings” app in iOS
- Go to “General” and then to “Software Update”
- When “OS 11.3” is shown as available, tap on “Download & Install” to begin the process of installing the software update

Users can also install iOS 11.3 through iTunes and a computer, or by using IPSW files, but either of those requires a computer and a USB cable.
iOS 11.3 IPSW Download Links
For users who like to use IPSW to install iOS software updates, the links below point to IPSW files hosted on Apple servers. For best results, right-click and choose “Save As” and be sur the file has an .ipsw file extension.
- iPhone X
- iPhone 8
- iPhone 8 Plus
- iPhone 7
- iPhone 7 Plus
- iPhone 6s
- iPhone 6s Plus
- iPhone 6 Plus
- iPhone 6
- iPhone SE
- iPhone 5s
- iPad Pro 10.5 inch
- iPad Pro 12.9 inch 1st generation
- iPad Pro 12.9 inch 2nd generation
- iPad Pro 9.7 inch
- iPad 2017 model, not pro, 9.7 inch
- iPad 2018 model not pro 9.7-inch
- iPad Air 1
- iPad Air 2
- iPad Mini 4
- iPad Mini 3
- iPad Mini 2
- iPod Touch 6th generation
Using IPSW is generally considered advanced and unnecessary for most users to engage in, though it is not particularly complex.
iOS 11.3 Release Notes
Full release notes accompanying the iOS 11.3 software update are as follows:
Separately, watchOS 4.3 and tvOS 11.3 are also available to download and install for Apple Watch and Apple TV, respectively. WatchOS 4.3 has a new Nightstand mode setting, along with updated music controls. HomePod users can find a large 2GB software update available for their HomePod speaker. Mac users will also find macOS High Sierra 10.13.4 or Security Update 2018-002 available as software updates, depending on which version of system software they are running.