You don't have 2 be rooted, but right now you can only get by manually installing it, unless you wanna wait till Verizon pushes it, no clue when that'll be.
Here's the link & the install instructions
Blur_Version.5.5.893.XT875.Verizon.en.US.zip. Be sure you have the Motorola drivers installed from USB and PC Charging Drivers - Motorola Mobility, Inc. USA on your PC. Or you can download it directly to your phone at
http://db.tt/b8eleKEi If you do that, use a File Managing app (like Astro) to move it to the correct location in step #4 (and skip step #5).
1. Go to Menu>Setting>Applications>Development and check "USB Debugging."
2. Plug phone into computer.
3. Press "Mass USB Storage" from the list of choices. Two drives will show up. One is MOT (Internal Storage) and the other is Removable Drive (SD-EXT).
4. Put the downloaded file on the root (ie main area) of SD-EXT (not internal storage). No need to change the name or extract it.
5. Eject both MOT and Removable Drive and disconnect the phone from your computer.
6. Power phone down
7. Reboot into stock recovery (adb reboot recovery) by holding Power and Volume Up/Down at the same time.
8. When the robot appears, press both volume keys in at the same time.
9. Select “apply update from sdcard” using the volume keys, then Power to initiate it.
10. Using the Volume keys, choose the file that you downloaded above, press Power and let it load.
11. When the install is done, press Power. It'll reboot, but it'll be longer than normal (a few minutes)
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