Nexus 4 hybrid with LTE 4.4

Let's say :

- you have a Nexus 4
- you have unlocked your bootloader
- you're running 4.3 with LTE radio (see one of my previous posts)
- you received the OTA update for 4.4
- you tried to update but you got an error (normal)

Check your build number in Settings/About Phone/Build Number, download the image corresponding to your build and reflash the modem that corresponds to your build.

In my case, I was running JWR66Y so I reflashed the 2.0.1700.84 baseband modem :

$ adb reboot bootloader
$ fastboot flash radio radio-mako-m9615a-cefwmazm-2.0.1700.84.img
$ fastboot reboot

After reboot, open the OTA update and choose to update to 4.4.

Go through the update process (you will not loose your data!) and when your phone has rebooted, simply flash back the LTE radio from JOP40C or JOP40D (baseband 2.0.1700.33)

$ adb reboot bootloader
$ fastboot flash radio radio-mako-m9615a-cefwmazm-2.0.1700.33.img
$ fastboot reboot

For more info on hybrid modems, check this post on XDA :

http://forum.xda-developers.com/showthread.php?t=2087227

And all the Nexus 4 (occam) images can also be found here :

http://www.randomphantasmagoria.com/firmware/nexus-4/occam/