fail to update IOS 15

Hello and welcome to Apple Support Communities osward85,

We see that you're unable to update the software on your iPhone. We know that it is important to keep your device updated, and we'd be happy to help.

First, you'll want to be sure that the device that you're using is compatible with iOS 15. If you're using a device that is compatible, then you'll want to go through the steps in the second article below, to help with updating your software.

iPhone models compatible with iOS 15

If you can't update or restore your iPhone or iPod touch

Thank you for using Apple Support Communities.

osward85 Said:

"fail to update IOS 15: fail to update iOS 14.8"

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Why the Issue? There is an error connecting to Apple's servers.

To Check for Updates:

Use a Computer and Ethernet:

Start with attempting an update through use of a computer. If you cannot use Wi-Fi, then use Ethernet.  Go Here: Update your iPhone Using a Computer - User Tip. On the computer, you would connect it through Ethernet, going directly into your router. For a Mac (or PC) that does not have Ethernet, this would be the adapter to use: Belkin USB-C to Gigabit Ethernet Adapter - Apple. If you get the same error, the model is likely just not compatible.