Why is my iOS update no working
I want to update my iOS to 15 but it’s not working
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Depending on what type of iPhone you use.
If your iPhone is eligible for an update, you can check by reading this Apple article:
iPhone models compatible with iOS 15
https://support.apple.com/en-gb/guide/iphone/iphe3fa5df43/ios
At the top left you can select the correct iOS.
If your iPhone is eligible for an update, go to: Settings -> General -> Software Update