cellular update failed, ios 14.7.1

Ok, I finally got my phone working on Friday. I had to call Apple 3 times. The first time I was cut off, but managed to get the phone backed up to my Mac, which I couldn't do before. The second time the tech got me to the point where I was downloading 14.7.1 again in order to reinstall it. He said that it would take about 20 mins then just follow the prompts, then he ended the call because he thought it would go ok. Nope. The download stalled. Didn't show any progress on the bar. I waited about 10 mins to make sure, then I called back again. The final tech said, "you don't need to do that", and just had me restore the phone from the backup. That fixed it. It's been working fine all weekend, so I'm presuming it will continue to be fine. Oh, and before I called Apple on Friday I called Telus, and right away the tech said, "we've seen this before, it's not our problem, it's the update, I'll connect you to Apple." So, Apple knows that this is a problem.