How to downgrade Lenovo Vibe Z 3G Dual Sim K910 4.4.2 to 4.2.2

If you have the Lenovo K910 Dual Sim, you are in luck as you can downgrade the Android Kit Kat 4.4.2 to 4.2.2. NOTICE: THIS WON’T WORK ON LTE VERSION SINGLE SIM K910L!!!
Here are the step:
1. Connect your K910 to your computer and wait until it is recognized.
2. You should see it is detected as a drive. Click it and install the autorun for the driver.
3. Download K910_SS_S_2_040_0109_131226 rom and unzipped it. The link is attached below on SOURCES.
4. On your computer, you should see K910 is detected as media storage. Click it open and make a new folder and renamed it sdfuse. Put the
K910_SS_S_2_040_0109_131226 rom inside the folder.
5. Turn off your phone and unplugged it.
6. Push power + volume down until its vibrate. Then let go the button.
7. Use volume + and – to choose SD Update.
8. Choose
K910_SS_S_2_040_0109_131226
9. Reboot.
10. Finish!
WARNING: DO THIS AT YOUR OWN RISK. WE ARE NOT RESPONSIBLE FOR ANYTHING THAT CAN HAPPEN TO YOUR PHONE!
SOURCES:
K910_SS_S_2_040_0109_131226  ROM: https://disk.yandex.ru/public/?hash=BpC8…WTkbhbo%3D
If the link is no longer available, just search the rom on Google. Thanks.