My iPhone XR will not update to iOS 15, despite several attempts. It flashes “unable to install update, error occurred “

vickram208 Said:

"My iPhone XR will not update to iOS 15, despite several attempts. It flashes 'unable to install update, error occurred ': Error on iOS update attempts"

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Why the Error?: There is an issue 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.

Thanks for posting the screen shot. Your iPhone in Low Power Mode. It will never update via Wi-Fi when you are using the Low Power Mode. Set Low Power Mode to OFF and then try again.

Below are other things that you need to consider when attempting an update over a Wi-Fi Network:

Make sure that your iPhone is setup to meet the following requirements before you attempt to update the iOS version-

• Your iPhone must have a fast Wi-Fi connection; you cannot update over cellular data or a cellular hotspot
• The iPhone can not be in Low Power mode
• The battery state of charge must be above 50%
• Your iPhone must have at least 6GB or more free storage space
• Your iPhone cannot be connected through VPN
• You should leave the phone plugged in until it finishes updating, both to assure that it remains above 50% and to keep Wi-Fi enabled (Wi-Fi turns off when the phone sleeps if not connected to power).

Axel F.