For all those Rogers Canada people who unlocked their phones and can't get wireless sharing to work with their preferred carrier, this update solves that problem. You're not able to automatically configure your phone to whichever service provider's sim card you've got in your lumia 920 device, delete the old apn settings you had before the update, then restart the phone. Now you're able to wireless share, and not get that annoying "no mobile internet available" error. Well it worked for me that way.