[Lenovo Yoga Tab 2 Guides, News, & Discussion] ichiai:
FINALLY Lenovo Yoga Tab 2 Pro 13.3" +Lollipop UPDATE NOV 2015 (for non root device)

This is the first somewhat official release of lollipop for the 1380F ::: Lenovo Yoga Tablet 2 Pro Android with Projector ::: avoid flashing this if your device is rooted

This update (as to my knowledge) was first released to some region and then perhaps pulled off. I'm I Japan and I did not receive this update

The original poster ionioni shared a download link in the lenovo forums

https://storage.rcs-rds.ro/links/9e7a1ddd-8aa9-4a47-a995-89b0a75fc25d

I have uploaded the same file to my rapidgator account

http://rg.to/file/5dfad2ef864bc65ac477139da26aa559

If any dev out there with androidfilehost.com cares to upload it there to would be great.

To install >>>>> if you never rooted <<<<

::: go to settings :: update :: upper right hand corner :: tool kit :: select downloaded zip

== so far so good, perhaps its a beta release but the word is so far that its better ==

**** you 99.999% might not be able to downgrade to KitKat ***

If it is a rooted device

By user ionioni

you should NEVER take an [ota] update AFTER you root. the rooting process modifies your system partition files and this is a problem because an update process will patch or replace files (and since Android 5.0 Google recomends the patch to be made against the whole system partition as a block patch, but it's not the YT2 case as they still use file patches), so if the files are modified by rooting, and they are, your update will fail and some of the files will be patched while others will not be and this will bring unexpected results: from minor ones to a complete hang.

so if you take an update always UNROOT before you take-it and reroot AFTER the update. that's no longer your case because you already screwed the system partition files, and the easiest way is to flash a stock rom (which ofcourse includes your system partition files among others) and this way you will restore the device.

but the problem (in your case) is that the stock rom you flash MUST match the bios version (KitKat rom matches an IA32 bios, while Lollipop matches an x64 one) and YOU HAVE after the Lollipop upgrade a Lollipop bios (x64) and you cannot just try to flash (as you did) a KitKat rom as this will fail (the files from your stock kitkat involved in the flashing process will fail to load because the bios is a x64 one and it wont accept files made for the IA32 architecture)

you have two solutions:

1. flash a stock Lollipop rom (but this is not yet made available by Lenovo, in general takes one or two months since the OTA before they release a complete updated rom)

2. return to KitKat bios and only AFTER you have downgraded the bios try and flash the kitkat (and after ofcourse you can re-take the Lollipop OTA). in this case again be careful, the one solution publicly available for returning to kitkat bios form lollipop is a 830/1050F and NOT a 1380F one (and i think noboy has tried yet a complete kitkat return). also be careful because the bios is not your mmc or sdcard drive, if you wrongly write it (with for wxample an incompatible version) you will HARD BRICK (and you will have no other solution but to send your tab to lenovo for fixing, it will be completely dead, no longer starting no lights nothing!).

MAJOR NOTES :::: IMPORTANT PLEASE READ ::::

by ionioni (original poster of the update)

Remember: if you have NO REGION configured when you do the Lollipop OTA update it will FAIL at the end and your tab will have errand behavior after the update (fails to boot, EFI shell, BIOS screen only, stuff like that) so remember to CHECK that you have a region configured BEFORE updating to Lollipop and if you don't have then set one. you most likely don't have one if you flashed back the stock kitkat rom at some point and didn't configuret one after.

check region: input in contacts the code ####59930# it should show a (your) region, if it shows Unknown you need to set a region

set (or modify) region: input in contacts the code ####6020# then chose your region, it will reboot and update (deleting your user data too so backup if required) after rebootyou can check region again and take the OTA

Little Notes

Your basic bloatware comes with the installation pacakge and that green security hd app is replaced by McFee, good news it is uninstallalbe.

The "downside" if any to this update is :: bottom drag up quick settings menu is gone and still uncertain if multiwindows is available. lenovo scratchpad works even better now.

Screenshots for the unbeliebers

[IMG="about"]http://i65.tinypic.com/xda6w2.jpg[/IMG]

[IMG="pulldown menu"]http://oi65.tinypic.com/bgzcrk.jpg[/IMG]

[IMG="keyboard"]http://i66.tinypic.com/2rzwj07.jpg[/IMG]

Quick Tutorial to remove bloat **** Requires Root *** by ionioni

you install your rom or your ota and only afterwards you modify your os. from within a shell use pm command to first disable/block unwanted apps for testing first (so you can pm enable/unblock them if you do something wrong) and if ok you can pm uninstall them. be carefule as the tool will allow you to basically disable any app (system ones included) so you should pay attention, start with the more easier ones (for eg among others i disabled com.lenovo.videoplayer as i instaled mxplayer, com.lenovo.email i don't need it i have gmail app etc)

google for "Android package manager pm" for more info on what is and how to use the tool. root required ofcourse.