[Guide - back to stock][KDZ][V40020B] - LG G Pad 7.0 v400 WIFI (e7wifi)

[Adam Myczkowski]

Hello if you own an LG G Pad 7.0 v400 and for some reason you didn't get an lollipop update or you coming back from a x ROM and want to flash
lollipop immediately instead of downgrading to KK and then updating it I have a KDZ for you.

*Due to locked bootloader on 5.0.2 you can only root it, flashing custom recovery will brick your device.

** If your tablet falls into bootloop after downgrading to lollipop or going back to stock (Kitkat/Lollipop) from a custom ROM, it will fall into bootloop. Don't worry, all you have to do is just to perform a factory reset.

Version:
V40020B - Lollipop 5.0.2

Downloads:
LG Driver for windows

V40020B_00 - Google drive

V40020B_00 - AndroidFileHost
md5: 3222c3582a12dc59e411853e0a150a15

LGFlashTool2014

INSTALLATION:​

1. Download and extract zip file, inside it you should find a V40020b_00.kdz file

2. Boot your tablet into a download mode

3. Now we need to open a LG Flash Tool...

4. In the first box, "select type" you need to select the 3GQCT option.

5. In "phone mode" select "emergency"

6. Now click on the little folder to choose your file

7. Navigate to your file location, select it and press open

8. Now just click on "Normal Flash"

9. Now on your screen should pop up the window where you select the country and language. You don't need to care about it,
language will automatically change to english.

10. LG Support Tool window should pop up

11. You would probably get an software update error but again you do not need to care about it.
Just press ok.

12. As you see on the picture do not unplug your tablet! It is upgrading just now! You'll see files flashing into your tablet and progress bar going further and further.

13. DO NOT close the window until your tablet reboots.

14. Perform a factory reset and enjoy Android LOLLIPOP

 

[Hammerhand.17]

Is there any way to use TWRP recovery on it? I've tried with no result, the same as flashing without recovery (with FlashFire).

 

[Adam Myczkowski]

Is there any way to use TWRP recovery on it? I've tried with no result, the same as flashing without recovery (with FlashFire).

No, you need to extract the zip file. Inside it you've got a normal kdz which you can easily flash using LG Flash Tool 2014

 

[Hammerhand.17]

Thank you. I meant if there were any way to install TWRP that I unknow. Hope somebody updates TWRP to use it in Lollipop.

 

[Adam Myczkowski]

Thank you. I meant if there were any way to install TWRP that I unknow. Hope somebody updates TWRP to use it in Lollipop.

Actually it might be due to locked bootloader on 5.0.2, tried flash something via Flashfire but it says it cannot overwrite anything over existing data, or simply just says flashing was successful and boots LG's soft..
Maybe we could make something in the future. I'll keep trying and thinking.

 

[Dr.TheMaster]

Thank you for your work
Just to be clear I have some questions :
1 - Will I be able to flash KitKat KDZ over any ROM via this guide? (Can I downgrade from Lollipop?)
2 - This should help me after downgrading to root then install TWRP and then basically any ROM I need.. right?
3 - I heard about some devices (v410 specifically) when downgrading.. It makes the internal storage only 4 GB.. Do we have this issue on any of our KDZ on v400?
4 - and only two last questions that are unrelated to the topic (sorry)
Does this tablet support OTG?
And when installing CM12.1 can I have OTG (if supported) and IR working?
Thanks again for your time.. Have fun making our LG tablets better

Kindly press thanks if I helped

 

[Adam Myczkowski]

Thank you for your work
Just to be clear I have some questions :
1 - Will I be able to flash KitKat KDZ over any ROM via this guide? (Can I downgrade from Lollipop?)
2 - This should help me after downgrading to root then install TWRP and then basically any ROM I need.. right?
3 - I heard about some devices (v410 specifically) when downgrading.. It makes the internal storage only 4 GB.. Do we have this issue on any of our KDZ on v400?
4 - and only two last questions that are unrelated to the topic (sorry)
Does this tablet support OTG?
And when installing CM12.1 can I have OTG (if supported) and IR working?
Thanks again for your time.. Have fun making our LG tablets better

Kindly press thanks if I helped

1 - Yes you can, when I was making this guide I was downgrading to the stock 5.0.2 (the one in the guide) from cm13 android 6.0.1. When you downgrade it to either KitKat or Lollipop (KDZ) from any ROM it will bootloop, you need to factory reset it manually and you're ready to go! It is the same for downgrading it from this 5.0.2 kdz to Kitkat. If you anyway want to downgrade it straight to KitKat just use V40010c kdz instead, it is available from a while..
2 - Unfortunately Lollipop 5.0.2 in this device has a locked bootloader what means you can't do anything, anything except root (same method as on 4.4.2 confirmed working) but that's basically all. If you want to flash the ROM as I do you have to downgrade it straight to KitKat, root it, flash recovery via app like flashify ( for some reason it does not support fastboot ) and then flash the ROM.
3 - I'm not actually sure what you mean but in this tablet (doesn't matter what ROM or firmware you're running) you'll always have 4GB of memory for your usage. partition is divided into two: 4GB of memory for you and 4GB is taken by the system. I'm pretty sure cyanogenmod needs less space but I never tried messing up with my tablets data partition. I think it is possible though but I just don't recommend it, high risk of literally breaking your tablet. I tried to extend data partition on RemixOS, I did something wrong and it never boot up. Tablet is not a memory stick, you can't just format everything.
4 - Yes, it does support OTG, confirmed working on firmware 5.0.2, CM12.1 snapshot, EuphoriaOS and CM13. Doesn't work in the recovery. And about IR blaster - Simply no, cm and other ROMs are almost stock android that doesn't even know what IR blaster is and any LG APP cannot be installed on different source code than their's.

 

[Dr.TheMaster]

Thank you so much for your explanation.. When I meant 4 GB.. I mean 2 or even less available for user.. The default in this device is 8 GB.. 4 GB for user.. But it seems like there's definitely no issue at all when installing ROMs and moving between them.. Thanks again..

Kindly press thanks if I helped

 

[Adam Myczkowski]

Thank you so much for your explanation.. When I meant 4 GB.. I mean 2 or even less available for user.. The default in this device is 8 GB.. 4 GB for user.. But it seems like there's definitely no issue at all when installing ROMs and moving between them.. Thanks again..

Kindly press thanks if I helped

I flashed ROMs and reflashed firmware about 70 times altogether and never got that issue.. Kinda weird...

 

[Dr.TheMaster]

I flashed ROMs and reflashed firmware about 70 times altogether and never got that issue.. Kinda weird...

Yeah it happens with v410 devices (LTE)
That's why I asked about this device

Kindly press thanks if I helped

 

[Dr.TheMaster]

a small question
V40010c_00.kdz is KitKat
V40020B is Lilliopop
right? thanks @Adam Myczkowski

 

[Adam Myczkowski]

a small question
V40010c_00.kdz is KitKat
V40020B is Lilliopop
right? thanks @Adam Myczkowski

Yes you're right

 

[edwinperu]

hello brother, apology writing I'm using google translator, I followed your videos on youtube and all, I have a lg v400 Gpad 7.0 5.0.2 android version of the software and my v40020b ... this update is really bad because games are super slow especially Asphalt 8 ..... I want to install cm12.1 or 13, I have my tablet rooteada, to install TWRP 2.8.5.0 with flashify did all your procedures and reboot I get:
error: verify certification boot
and restarts and me back to the home screen .... I'm talking from peru .... greetings for your great work ......

how could return to kikkat I think that in this version the games were more fluid ..... I have searched and can not find the KDZ besides I could not even make a backup because I can not install the TWRP ..... if that tutorial it works to return to kitkak you would be obliged ....... goodnight ....

 

[Adam Myczkowski]

hello brother, apology writing I'm using google translator, I followed your videos on youtube and all, I have a lg v400 Gpad 7.0 5.0.2 android version of the software and my v40020b ... this update is really bad because games are super slow especially Asphalt 8 ..... I want to install cm12.1 or 13, I have my tablet rooteada, to install TWRP 2.8.5.0 with flashify did all your procedures and reboot I get:
error: verify certification boot
and restarts and me back to the home screen .... I'm talking from peru .... greetings for your great work ......

how could return to kikkat I think that in this version the games were more fluid ..... I have searched and can not find the KDZ besides I could not even make a backup because I can not install the TWRP ..... if that tutorial it works to return to kitkak you would be obliged ....... goodnight ....

I think you didn't my video's description properly, 5.0.2 has locked bootloader so you have to return to kitkat to flash the recovery. You can revert to kitkat by following this tutorial with the exception of using this kdz file: http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FW975106432109876543213/V40010c_00.kdz

 

[PaideLis]

I think you didn't my video's description properly, 5.0.2 has locked bootloader so you have to return to kitkat to flash the recovery. You can revert to kitkat by following this tutorial with the exception of using this kdz file: http://csmgdl.lgmobile.com/dn/downloader.dev?fileKey=FW975106432109876543213/V40010c_00.kdz

Hey bro, I have a LG G Pad running official 5.0.2 firmware with a software version V40020b do you know where do I find this KDZ?

This link you have posted doesn't work anymore... Thanks.

 

[Adam Myczkowski]

Hey bro, I have a LG G Pad running official 5.0.2 firmware with a software version V40020b do you know where do I find this KDZ?

This link you have posted doesn't work anymore... Thanks.

Which kdz? 5.0.2 or 4.4.2? For 5.0.2 use Androidfileshost link from first post, for 4.4.2 use the link from the post you have quoted. It does work, download starts automaticly

 

[PaideLis]

Which kdz? 5.0.2 or 4.4.2? For 5.0.2 use Androidfileshost link from first post, for 4.4.2 use the link from the post you have quoted. It does work, download starts automaticly

Thanks man, I don't know why my Google Chrome shows a blank page and don't start download so I used a download manager and it's downloading.

Last question, can I use this KDZ (4.4.2 V40010c) on my tablet (V40020b)?

 

[Adam Myczkowski]

Thanks man, I don't know why my Google Chrome shows a blank page and don't start download so I used a download manager and it's downloading.

Last question, can I use this KDZ (4.4.2 V40010c) on my tablet (V40020b)?

Yes, if you want to flash custom ROMs. KitKat bootloader is a must

 

[PaideLis]

Yes, if you want to flash custom ROMs. KitKat bootloader is a must

Now I swear that's really the last question :laugh:

My tablet will stay in portuguese using the V40010c? Because it's a Brazilian version and I'm brazilian.

 

[Adam Myczkowski]

Now I swear that's really the last question :laugh:

My tablet will stay in portuguese using the V40010c? Because it's a Brazilian version and I'm brazilian.

English is default but you can change it to any language, not a problem