Its works whit XT910 Korean Retail (S/K).
It is my first post so i can not post links, so remove spaces.
Extract from here: xt910ks.blogspot.com.ar
Motorola Drivers and RSD >5.9 : No links,please google
Tool erase the CID & Root: w w w .me diafire .com/?6e1prdc0cq6eraq
Firmware 4.0.4: w w w .droi deve lop ers.com/dow nloads.php?do =file&id=1407 (need free register)
Update: www .med iafire .com/?7s2e953kuka1xa9
Step 1: Erase CID
Put XT910 in Fastboot Mode: Volume up + Volume down + Power
Press volume down to Fastboot and then volume up to select
Conect to pc and install drivers
Decompress "Xoa CID & Root.rar", Find "Xoa CID" folder and double click on "run.bat" and the others 3 .bat files
Step 2: FLash Firmware
Put in Fastboot again, open RSD Lite annd select "SPYDERIRD_U.01.6.7.3-94_SPI-324_04.11.01P_0A.74_ASIA_RETAIL_HKTW_CFC_HWp2b_SIG NED.xml.zip" archive (firmware 4.0.4)
if the flash process fails means that CID is not deleted, back to step 1
After finish all task whitout errors, reboot cellphone, press Volume up, volume down and Power, and selet "BP Tools"
wait boot correctly, aprox 1~2 min
Put the update in SD Card, and turn off
Boot in recovery mode: Volume down+volume up+Power, and select recovery
When appear Android logo press volume up+ volume down quickly,
Do a full wipe
select install zip from sd card, and select "Blur_Version.673.94.328.XT910.AsiaRetail.en.03.zi p" archive.
wait to terminate
Full wipe again
Reboot and select BP tools again
Step 3 Fix Boot + Mass Storage:
Activate "USB Debugging" and plug to pc, find the root folder from "Xoa CID & Root.rar" archive and extract,
then run "EasyRootICS_Windows.bat"
cellphone will reboot 3 time, remember to boot in "BP Tools" always,
when done, run EasyRootICS_Apps.bat to install apps
in Cellphon Run Boot Menu Manager, install Hjihack, in 1st system turn on the first 2 items,
now restart, and after 3 seconds the cellphone will pass costumer id error and boot properly.
Tested on my XT910S.
Regards from Argentina!