Apple Releases iOS 18.6.1 (22G90) – Here’s What’s New and Which Devices Are Supported
Apple has officially rolled out iOS 18.6.1 with build number 22G90. This update brings a new Blood Oxygen experience for users in the United States who have an Apple Watch Series 9, Series 10, or Apple Watch Ultra 2.
With this update, blood oxygen measurements are now calculated directly on the iPhone and can be viewed in the Health app.
📱 Supported iPhone Models
iOS 18.6.1 is available for the following 29 iPhone models:
- iPhone 11
- iPhone 11 Pro
- iPhone 11 Pro Max
- iPhone 12
- iPhone 12 Pro
- iPhone 12 Pro Max
- iPhone 12 mini
- iPhone 13
- iPhone 13 Pro
- iPhone 13 Pro Max
- iPhone 13 mini
- iPhone 14
- iPhone 14 Plus
- iPhone 14 Pro
- iPhone 14 Pro Max
- iPhone 15
- iPhone 15 Plus
- iPhone 15 Pro
- iPhone 15 Pro Max
- iPhone 16
- iPhone 16 Plus
- iPhone 16 Pro
- iPhone 16 Pro Max
- iPhone 16e
- iPhone SE (2020)
- iPhone SE (3rd generation)
- iPhone XR
- iPhone XS
- iPhone XS Max
🆕 Key Changes in iOS 18.6.1
- Blood Oxygen Updates: New method for taking and processing blood oxygen readings for supported Apple Watches in the US.
- Health App Improvements: Data is now processed and displayed more efficiently in the Health app.
- Security Fixes: Apple has made important updates to improve privacy and security.
🔄 How to Update
- Open Settings on your iPhone.
- Go to General > Software Update.
- Tap Download and Install.
- Make sure your phone is connected to Wi-Fi and has more than 50% battery.
ℹ️ More Information
For detailed security changes, visit Apple’s official update page: Apple Security Updates

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