Stuff you'll need: Xbox 360 Computer USB thumb drive (recommended) OR writable CD and CD writer Zip file extractor, I use [77-Zip]First of all, you'll need the update file. displaylang=en&Family ID=d7b1a7d8-846b-4ff4-8810-25356ec2c2aa DO NOT FOLLOW THE INSTRUCTIONS ON THAT PAGE! If they did, I probably wouldn't have bothered to write this instructable.
Just download the file, that's all you need to do there.
Check with your service provider, but you might be able to make your phone a mobile hotspot, then connect your xbox wirelessly (via wifi) to that.
Here is the page where I found out how to make it work. If you have a writable CD a thumb drive, use the thumb drive, because it's much easier.Microsoft pulled its support page that instructed users how to update their Xbox One systems offline using a USB drive.We've included an image of the cached support page above, which is no longer available to view.Your phone will have to have a wireless hotspot service enabled in order for that to work.
If you have wireless hotspot capability it is as simple as turning on mobile hotspot, noting the ssid (the name you gave your hotspot) and the password, then on your xbox go to: Settings, System, Network Settings.Not really- you can (and should) only get updates via Live.