[GUIDE] [XOOM2/XYBoard]: How to update Xyboard wifi (MZ615) to Jelly Beam (4.1.2)

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Warning:
1. This guide comes with ABSOLUTELY NO WARRANTY. I'm not responsible for your data, your Xyboard, your girlfriend or something else . But report at this thread if you have problem. I will try to improve this guide.
2. Follow every step of these instructions carefully.
3. Everytime you reboot or power on your Xyboard, it will stuck at boot screen with warning "CustomerID error, Contact Dealer...", And you need press "+", "-" volume key and "power key" simultaneously to boot. Because you need clear "cid" of your Xyboard to flash this rom.
4. Sorry for my terrible English. I'm Vietnamese


Start:

1. Download Jelly Beam fastboot file for Droid Xyboard (MZ617): http://www.teamblackhat.net/theorang...izon-US.tar.gz
Extract by 7z to hard drive.

2. Download this file: https://dl.dropboxusercontent.com/u/...guide/MZ615.7z (included moto_fasboot, fake_cid, adb. I'm sorry for "license", "rights" because I'm collect it from many thread on many forums. Thereforce I'm can not remember the authors of those). Extract to same folder with fastboot file at step 1.

3. Download and install RDS lite, Motorola Device Manager (google for links, sorry).

4. Backup and Reset your Xyboard.

5. Install Terminal Emulator (free on Google Play)

6. Backup your cid (very be carefull, more information here: How to update you Razr (Gsm) To Official Jelly Bean - xda-developers)
6.a. Open Terminal Emulator
6.b. Run one by one:

su
cd /dev/block
dd if=/dev/block/mmcblk1p15 of=/sdcard/cid.img

6.c. Copy "cid.img" file from your Xyboard to safe location (you should keep at least 2 copy on diffirent location, backup on cloud or store it in somewhere safe). Double check this step.

7. Change your cid
7.a. Copy "fake_cid" file from folder you created in step 1 to your Xyboard.
7.b. Connect Xyboard to your PC, enable USB debbuging.
7.c. Open terminal on PC (Windows + R: cmd), "cd" to folder you created in step 1. Run one by one:

adb shell
cat /sdcard/fake_cid > /dev/block/mmcblk1p15
exit

8. Shutdown your Xyboard. Press and keep "-" volume key => press Power key => release 2 keys => your Xyboard will boot in fastboot mode.

9. Flash your Xyboard to Jelly Beam
9.a. Open terminal on PC (Windows + R: cmd), "cd" to folder you created in step 1.
9.b. Run one by one

moto-fastboot flash motoboot motoboot.img
moto-fastboot reboot-bootloader
moto-fastboot flash devtree device_tree.bin
moto-fastboot flash boot boot.img
moto-fastboot flash system system.img
moto-fastboot flash logo.bin logo.bin
moto-fastboot flash cdrom cdrom
moto-fastboot flash recovery recovery.img
moto-fastboot flash preinstall preinstall.img
moto-fastboot -w
moto-fastboot reboot

10. Your Xyboard will reboot and stuck at boot screen with warning "CustomerID error, Contact Dealer...". Press "+", "-" volume key and "power key" simultaneously to boot.

Now you are get Jelly Beam.

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