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How To Update Iphone 6+ To Ios 15: A Step-By-Step Guide
About iOS 15 Updates - Apple Support
Can You Update iPhone 6 to iOS 15? No, But You Can For The 6s
Yes, your iPhone is probably compatible with iOS 15
iOS 15 is available today - Apple
How can I update my iPhone 6 to iOS 15.0 - Apple Community
The six-year-old iPhone 6S will get iOS 15, and that rules - The Verge
Update iOS on iPhone - Apple Support
Can your iPhone update to iOS 15? - TechRadar
iOS 15 Compatibility: Is Your Device Supported? - Lifewire