I want to update my iPhone but I am failing it can’t take the update

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Is your device compatible to update to the new version? See the article(s) below which show device compatibility for each IOS version. 

iOS 16 compatible devices

IOS 15 and iPadOS 15 Compatible Devices.  *

ed Devices List  -

For the update, see the articles below.

Update your iOS device.  -

Get help with over-the-air iOS updates  -

Update – Can’t or can’t restore   -

Have you tried using iTunes on a computer or Finder if running Catalina or later to do the update?

Update software on iOS devices in iTunes on Mac. -

Phone, iPad, or iPod touch - Update with Finder.  *

iPhone, iPad, or iPod touch - Update with iTunes.  *

If you see an error when you update or restore your iPhone, iPad, or iPod    *

Updating iOS: common issues and solutions.  -