I get an error about the firmware when attempting to update my iPhone to iOS 17

Your profile indicates that you have an iPhone 6s.

An iPhone 6s cannot run iOS 17, or even iOS 16 for that matter.

iOS 15.8.2 is the end of the road for the iPhone 6s.

Ddddd74 wrote:

I’m trying to update to iOS 17 but in the middle of installing it stops and tells me that my firmware is corrupted

Do you have a Mac...

If your iPhone won't turn on or is black /frozen / stuck DFU mode

If your iPhone won't turn on or is frozen - Apple Support

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

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

as a ref you can read more: https://imazing.com/guides/how-to-put-iphone-ipad-into-recovery-or-dfu-mode