fighting the exact same issue and have been struggling with it for 2 days plus. extremely frustrating!!
see one of the problems is that if the phone is stuck on iOS 12.2. -> wireless iOS updates are not supported yet for that phone. so you need to connect the USB cable to a PC running iTunes or a Mac running iTunes or Finder (depending on the generation of the Mac). Since Big Sur came out -> iTunes doesnt work any more. Since Big Sur the iOs management for mobile devices runs via Finder.
I have tried everything:
- update attempt via old macbook pro running big sur and connected phone via USB cable (update via finder) -> no joy. the error always just says:
there was a problem downloading the software for iPhone. the requested resource was not found.
- update attempt via rather new Macbook Pro (M1 generation) running the newest OS Sonoma and connected phone via USB cable (update via finder) -> no joy.
there was a problem downloading the software for iPhone. the requested resource was not found.
- update attempt via old Windows PC running Windows Professional and connected via USB cable (update attempt via iTunes) -> no joy. the error there is that the latest iTunes version possible to install on Windows 7 is too old to run the iOs update.
- update attempt with iPhone X in recovery mode connected to macbook via usb cable -> no joy. the recovery mode did not help and did not install the newest 16.7.4 either. the error message is slightly different now:
The iPhone software update server could not be contacted. The requested resource was not found.
I have a sneaking suspicion that Apple may have turned off or discontinued the download server hosting this iOS Version 16.7.4. Is that possible ???
Oh did I mention that I tried different WifI networks, a mobile hotspot as well, restarting the wifi router?
Oh and did I mention I have 60 Gig of free space on this iphone? and did I mention it is charged to over 60% battery on each of these attempts?
Oh, did I forget to mention that I also called Apple Support in Ireland and they couldn't help either? They gave me a list of contacts of Apple service partners in my area. So I called one of them. They were not able to help me either.
If you have this problem you are apparently just left standing in the rain with your device that is stuck on an old OS. tough luck!!!
Apple!!! Do something!!!!