I wanted to do a write up on this topic a while ago, but unfortunately At&t took a bit longer than I had expected with the testing phase of the NoDo rollout. I finally received my Windows Phone update notification today and I can report that the official update process was painless and took less than 30 minutes. I did use the ChevronWP7.updater tool a few weeks back and received the update just fine, however, Microsoft has noted that using these tools and workarounds is NOT recommended and can cause future update issues with your device.
I will run through the steps for those unfamiliar with the process:
After plugging in my phone, the Zune software boots automatically and I am alerted that I have an update waiting.
Click Update Now to begin the update process.
The Zune PC software will begin downloading the necessary files to begin the update.
Next, the Zune PC software will automatically create a backup of your phone’s current state. In case there are any issues, this will allow you to return your phone to a previous state.
After sucessfully creating a backup of your phone, the software will then begin installing the update. For NoDo, the downloding phase was the longest part at about 10-15 minutes.
Once the update installation is finished, the software will automatically reboot your phone and will notify you that the update has completed. It is now okay to remove the device.
Some users may run into an error while updating their phone. In this case, Microsoft has created a resource for users to turn to if this is necessary. You can find that troubleshooting page here.
After going through the update, my phone’s (Samsung Focus) information page updated to include the following:
OS Version: 7.0.7390
Firmware revision number: 2188.8.131.52
Hardware rev. number: 184.108.40.206
Radio Software version: 2220.127.116.11
Radio Hardware version: 0.0.0.3
Bootloader version: 18.104.22.168
Chip SOC version: 0.36.2.0
Hopefully this little guide helps. If you have any trouble with the update or have any questions, feel free to contact me by visiting the About page or leave a comment on this post and I will do my best to provide assistance where I can.