Before the game was even released, I pre-purchased the $110 version to get the cool statue and obviously to play the game. Where I lived I had hardwired internet and was able to enjoy the game for about 30 hours. Fast forward a couple years and where I moved has terrible internet, so I've had to result in using AT&T Tethering service. This service has worked great for 99% of the things I've tried. Steam, Epic Games, Minecraft, Blizzard services, League of Legends and every site I've went to, including this one.
However, I cannot download anything from Ubisoft. I've contacted them to report this issue and I'm met with the same copy-pasted message everyone else who has connection or download issues has received. I saw one message about contacting AT&T about this issue, so I did and was told it wasn't anything on their end. I even refunded the game from Ubisoft and downloaded it from epic games, in hopes of being able to play a game that I very much enjoy. After downloading the game I'm taken to the Ubisoft launcher where I then have to download an update which I cannot do. I've tried all of the things Ubisoft has suggested about this issue and nothing has worked. I saw reports of this same issue after reading the forums more from back in 2019 and yet it's still somehow not fixed.
TLDR; If you use AT&T Tether service, don't buy anything from Ubisoft as you will not be able to play the game and be forced to go through hoops to even refund the game.