Or at least get the firmware update...Some steps may seem superfluous, but this worked for me.
1. Uninstall and Reinstall Preview for Developers
2. Opt-out of Preview.
3. Hard Reset (I know, but bite the bullet)
4. Reinstall Preview for Developers and Opt-in.
5. Check for updates over Wi-Fi. (It may take up to an hour following the Hard Reset to get the notice)
6. Download updates (you can still use Wi-fi. If your phone reboots, you will pick up where you left off).
7. Install while still opted in. If you opt out, the update will fail.
8. Enjoy the 21-step update!
You should now be at Firmware rev. ver. 3030.00.31005.651
9. Turn on Wi-fi and check for more updates again (MORE?!? Yes.)
10. Download and Install as before. This is for the OS, but I think it also updates your radio. Your about profile should look like this:
http://forums.windowscentral.com/at.../91866d1419194983t-wp_ss_20141221_0001[1].png
You're done! Now go mentor a child and buy American!
1. Uninstall and Reinstall Preview for Developers
2. Opt-out of Preview.
3. Hard Reset (I know, but bite the bullet)
4. Reinstall Preview for Developers and Opt-in.
5. Check for updates over Wi-Fi. (It may take up to an hour following the Hard Reset to get the notice)
6. Download updates (you can still use Wi-fi. If your phone reboots, you will pick up where you left off).
7. Install while still opted in. If you opt out, the update will fail.
8. Enjoy the 21-step update!
You should now be at Firmware rev. ver. 3030.00.31005.651
9. Turn on Wi-fi and check for more updates again (MORE?!? Yes.)
10. Download and Install as before. This is for the OS, but I think it also updates your radio. Your about profile should look like this:
http://forums.windowscentral.com/at.../91866d1419194983t-wp_ss_20141221_0001[1].png
You're done! Now go mentor a child and buy American!