This might help https://community.t-mobile.com/android-9/unable-to-perform-software-update-on-galaxy-s22-ultra-45890
Here’s an update:Spoke to TMobile support. They had me go through the same steps as before (reboot, wipe cache partition, etc). As expected nothing worked and they asked me to try a hard reset before replacing the device through the warranty. Didn’t try the hard reset and a warranty replacement was equally as painful so I didn’t want to go that path until I was sure there was no other way. Tried to update via Smart Switch. On the first try the phone wouldn’t be recognized by my computer so I had to reinstall the device drivers a couple of times. On the next try it connected and I was able to start the update via Smart Switch. During the installation step it failed because it said the device couldn’t recognize the “update mode”. It instructed me to restart the device and try again. Restarted the phone and it again wouldn’t connect to Smart Switch. Randomly I decided to try and update the normal way just through the phone. This time it worked - I have no explanation why it did. After the
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