If you have the new Sprint HTC Arrive, you don’t need to worry about this since your phone already has the NoDo (v7390) update installed stock. For those of us GSM users out there that have the HD7, Focus, Surround, etc, there’s now a way we can “trick” Zune into updating our phones to NoDo too!
This thread at XDA has the instructions for you. But basically you have to registry unbrand your phone using the “000-88” registry hack. Then you download a Network Connection PBK file to connect to a network in Hungary. Disable WiFi on your phone, connect it to the PC with Zune, then go to the Cellular settings menu.
Now for the tricky part. You have to time this just right or it won’t work. It took me probably 15 tries to get it to work on my Surround. You tell Zune to check for phone updates, but before it says “Your Up-to-date”, you have to disable your phone’s data connection. If you do it too early, you’ll get an error that it can’t check for updates. If you wait too long, it’ll say that you’re up-to-date. But, if you do it just right, it’ll say the March 2011 update is available. You might want to cross all of your fingers and toes too, because you could be trying to get the right combination for hours before it actually works for you.
So for our GSM users out there, have you tried this and did it work? If it did, how many tries did it take you? I know I’m glad I don’t have to wait around for At&t to “test” this update!