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Solved: Root + GApps + Android 4.4.2 on Lenovo K910

I've done it!

I now own a Lenovo K910 that has Android 4.4.2 installed and VIBE UI 2.0 (VIBEUI_V2.0_1431_6_DEV_K910_baralajbi).

It has Root access and WORKING Google Apps.

Here's what I've done:

I pretty much followed the steps described in the attached document View attachment 2984790 - a lot of thanks go to Azeem Zuhair who created it, except for some minor but very important changes (which I'll mail them to him).

:confused: You need to figure out which type of device you own:

is it a Kiton device? is it a Kitonw device? is it a K910 device?

I don't know how to check that except by trying to flash some Vibeui_x.zips and then the device displays something like "Expected fingerprint for Kiton or Kitonw, this device has K910" and then displays "Installation aborted".

Mine is a K910 device, that I figured out by trying to flash a lot of ROMs.

Basically, you need to flash a QSB file, called K910_SS_S_2_040_0109_131226.QSB (Google it and you'll find it available for download OR follow the three links in the document on point 8, I preferred the Google Drive link and I think you know why...). It contains Android 4.2.2 and VibeUI 1.0 or 1.5, doesn't matter. What matters on this version is that flashing this file will unlock the bootloader, allowing you to fastboot a custom recovery image in order to gain access to the device and to upgrade it to KitKat (4.4.2), to install SuperSU and Google Apps.

Now, according to Azeem Zuhair and his mentioning in the attached doc, one should Deactivate Windows 8/8.1 Driver Signature Enforcement. I've done that and personally I don't think this has something to do with the process, but may help installing / uninstalling drivers (that by the way you can find them if you plug in your phone to your computer through the USB data cable) in such way that the Device Manager should show you Android Composite ADB Interface instead of Lenovo ADB Composite ADB Interface. So steps 1 to 7 ARE important and by all means, follow them like the guy tells you to!

Steps 9 through 14 tell you how to flash the K910_SS_S_2_040_0109_131226.QSB file. That should be pretty easy even for the first time of flashing. After that, you'll have Android 4.2.2 and Google Apps and a lot of Chinese apps, but you have an UNLOCKED BOOTLOADER. Of course, here you have to enable the USB Debug Mode. How to do that? Go to Settings -> Feature(s) -> About phone -> Version Information and tap on 'Internal Version Information' for 5 times until you see a message like "You are now a developer". That enables the Developer Options menu on the same navigation path Settings -> Feature(s) -> Developer Options. Go there and enable the "USB Debugging".

Follow steps 16 to 19 and install ADB Fastboot and download the CWM Recovery image (unzip it and rename it as 'recovery.img' or 'recv.img' because you'll have to type it later and you don't wanna type 'cwm_recovery_custom.img' on a command line... :silly: )

On step 20 point 20.1, downloading VIBEUI_V1.5_1427_3_ST_K910_C316.zip will be a waste of time for those that have a K910 device, not a Kiton or a Kitonw (you may download it and try to flash it and even might work for you, it didn't for me...).

On this step, I got this file:

VIBEUI_V2.0_1431_K910_baralajbi_V4.zip

that worked on my K910.

Steps 20 to 27 were performed as per attached document.

On Step 28, I chose to select YES when prompted that I'll lose Root access. And it worked for me.

That's it.

Good luck.