Here's what I did to get .901. You have to be at OTA 5.5.893 for this to work. Some of this you may have done in the past; this was gotten for a newbie.
You can get it from
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.
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)