I am getting error while checking for software update on my iPhone 13

Are you using a VPN connection or a Firewall for your router, that may be blocking the contact to Apple servers?

As of today, iOS 17.5.1 is the latest iOS version, just checked that on my iPhone and had no issues to connect to the Apple server.

Angelina2510 Said:

"Software update: Gives an error when checking the software update."

-------

Thank you for the screenshot.

Updating an iPhone:

Have a Computer Handy?: Update your iPhone Using a Computer - Apple Community