yashsingh1/xdaforums huggingface dataset:
[Lenovo P11] LakersDroid:
Just to be sure, do you have all the necessary drivers. There is a specific Lenovousbdrivers download you need to get and installed on your computer for it to work. Also, is your Windows version 10?

Did you put the tablet in EDL mode by holding volumn up and plug in your cable?

I need more details so I can help.
[Lenovo P11] LakersDroid:
When I have time I will post a tutorial with all the steps I did to get my tablet back to stock China ROM and locked bootloader.
[Lenovo P11] LakersDroid:
There is no variant tb138fu. I think it's just a typo. They meant to say tb138fc.
[Lenovo P11] Urban03:
Are you guys using newest ZUI 15 or rather stay with ZUI 14? Are there any problem with the newest version?

I saw some problems with losing L1 or WiFi and I'm a little afraid to update. Can anyone tell me about your experience?
[Lenovo P11] LakersDroid:
Hey guys, these are the steps I did to flash stock China ROM back on my Xiaoxin pad pro 2022, which came with modified "Global firmware" and unlocked bootloader.

Hopefully, this can help those struggling with trying to put the stock Chinese ROM back on their tablet.

Make sure you do this on a Windows 10 computer as I've read that some have encountered errors while trying to flash the ROM on Windows 11.

Here are the steps:

Backup your data! And make sure you're on modified Global ROM with unlocked bootloader.

1. Download all the files shown in the attached picture. Install the drivers, Qualcomm flash tools, unzip the Chinese stock ROM into a folder.

2. Connect tablet with the computer using a USB cable. Enable Developers Options and then Enable Oem Unlock and USB debugging. A window should pop up, check the box to remember it and hit Allow.

3. Unplug tablet and power it off. Now, hold the Vol Up button and plug the USB cable into the tablet, connecting it back to the PC. Keep holding it until you hear some sound indicating that it's connected to the PC. Now, it should be in EDL mode. The tablet screen should be black like it is off but it's in EDL mode.

4. Open the Qualcomm Flash tool that you installed, called QFIL. Select Meta build. Then, click Load Contents button and select the contents.xml file inside the unzipped ROM folder. Now, click SelectPort. You should see Qualcomm HS-USB QDLoaded 9008. Select it. Make sure the available meta build storage type is usf and product flavor asic.

Click download content and let the program do its thing. Hopefully, at the end of the process, you'll see a download finished. Successful message in the status box.

Your tablet should reboot at this point to the setup screen.

5. Once finished setup, Enable Developers Options again, Enable OEM unlock and USB debugging.

Open command prompt and enter command adb reboot bootloader.

Once in bootloader write fastboot flashing lock and select lock option on tablet. It will reboot back to setup screen. Set it up and your tablet should be in the Chinese stock ROM with bootloader locked.
[Lenovo P11] oksza:
Thank you so much for a great guide and support! I finally managed to get the Chinese ROM installed.

As expected, this process does not work in Win11, but does work on Win10. One critical installation step I missed was the Lenovo driver - I think it was not mentioned in one of the guides I was using, that's why I got Sahara fail. I would also recommend running QFIL in admin mode (not sure it matters but does not hurt).

One correction, the command at the end in the bootloader should be "fastboot flashing lock", not "adb flashing lock".

I would recommend cleaning as much of chinese bloatware as possible after install and disabling the browser and lenovo app center, as they are constantly "phoning home".
[Lenovo P11] oksza:
Fully upgraded now running 15.0.321, and no problems whatsoever so far.

I've seen people mention Wifi issue, tried some different APs and protocols, no problem so far.

ZUI 15 feels more polished and a little bit snappier, but this might be placebo effect.
[Lenovo P11] LakersDroid:
Thank you for letting me know the errors in my post. I fixed it now.

I'm glad it worked for you! And I 100% agree with disabling/uninstall all Chinese bloatware.
[Lenovo P11] LakersDroid:
Glad to hear. Just curious, do you still get Widewine L1 system wide? And on Netflix?

What about the Chinese apps, do they get reinstalled after updating the system to newer software versions?
[Lenovo P11] oksza:
Yes, Widevine is L1 systemwide, tested with Netflix & Amazon Prime apps DRM checker tool also reports L1.

90% of Chinese apps can be uninstalled. Those that can't you can disable manually in app properties, forcing them to stop working. They do not re-enable after reboot and even disappear from the main screen.

No additional apps installed or reinstalled on update (at first glance, maybe something did happen under the hood).
[Lenovo P11] porphyrin:
Is there a way to unlock the bootloader if I updated to ZUI 15? After enabling OEM bootloader unlocking, neither

fastboot flashing unlock nor fastboot flash unlock sn.img* work, with each giving an unknown command error. Factory reset is locked at ZUI 15. I'm afraid to force a downgrade after seeing that there are issues with downgrading without first unlocking the bootloader.

* (this was after following the steps to get my sn.img from the zui site.)
[Lenovo P11] LakersDroid:
Great to hear it doesn't mess up Widewine. I might update to ZUI15 soon.

How is the battery life on 15?
[Lenovo P11] LakersDroid:
You'll have to downgrade first and then follow the tutorial in this thread on first page to get it unlocked
[Lenovo P11] porphyrin:
Thank you for your reply. I see now – once I flash the original firmware, although I will be stuck in a boot loop due to the locked bootloader, fastboot tools should work and that will allow me to unlock the bootloader.
[Lenovo P11] LakersDroid:
Yes, follow the instructions by keyman91, and you should be able to boot up zui14 after flashing the img files from the ROM. Then you can go back into the bootloader and "fastboot flashing unlock"

Keep in mind, if you have bootloader unlocked, you can only have Widewine L3. Though you can still update software through OTAs
[Lenovo P11] dy2592:
so when you take a screenshot, clicking on the preview doesn't open it up or anything so you can edit it. Anyone have a solution?
[Lenovo P11] baraa1936:
Hello,

Does this device have an open source kernel?

I did search for it but I only find the TB132FU
[Lenovo P11] marcoswin7:
What I can do? The program failed and now the tablet don't power on and also when I connect to the PC just say that the USB device doesn't work correctly 😭
[Lenovo P11] TReddragon:
Thank you very much for the good instruction. I bought the Tablet with the same Aliexpress-Global Firmware. I tried to lock the bootloader with you're steps ahead for hours.... But it didn't work. If I use the normal command-box (cmd) and in the command-box before with the instructions you describe - but the command says, that the order "adb" can't be found. I installed every file you show in the picture.

If I use the the link from "Inquisitor"

https://xdaforums.com/t/lock-unlock-bootloader-xiaoxin-pad-pro-2021-tb-j716f.4347321/#post-85775623

and type in the commands in the adb-cmd.exe box the you're first command worked, (it started the bootloader where are the option "Start, Restart, Recovery, Power Off, Boot to FFBM") . When I type in the same command-box " it said "write fastboot flashing lock" it said "FAILED: remote unknown command". How I can solve this problem?

I already tried the method about the LockUnlockBootloader ((from the link above) with my sn.img-number,too.... But this didn't worked for me. ("FAILED: remote unknown command"). What I can do now?
[Lenovo P11] LakersDroid:
marcoswin7 : "What I can do? The program failed and now the tablet don't power on and also when I connect to the PC just say that the USB device doesn't work correctly 😭"

Make sure you have proper adb drivers installed on your computer.

Are you able to put the tablet in EDL mode? "Hold volumn up and connect your tablet to the PC"
[Lenovo P11] LakersDroid:
Are you trying to lock the bootloader while on the modified "Global ROM"? If so, it wont work, that modified ROM required unlocked bootloader to run. Which is why the tablet is sold with unlocked bootloader running the modified Global ROM.

You will have to be on a stock Chinese zui14 ROM then you can run the "fastboot flashing lock" command.
[Lenovo P11] TReddragon:
Thanks for your fast answer. No it isn't the global Firmware. I looked in the system from the TB138FC and wondered it's the newer official version 15.0.259 (CN/Eng) - is a rollback to your Version 14 necassary to lock it?
[Lenovo P11] LakersDroid:
Yes, I believe you have to be on z14 for the command to work. They changed it with Z15.

So just do the steps to downgrade to z14 through EDL mode. then run the fastboot command to lock bootloader. Then update to Z15.
[Lenovo P11] marcoswin7:
just the battery go empty, later i charged the tablet then power on again but still program not working. here the log . what i can do?
[Lenovo P11] TReddragon:
I tested it yesterday and the rollback to Z14 was impossible - There was an error with QFIL and than I can't start the tablet anymore. I made an hard reset (pushed the vol- and power-button for 30s) and than luckily the ZUI 15 version starts again. I used

Link 3 (report tested working by BlackVictor)

Maybe I try another version. Is it an option to Boot to FFBM (I don't know what FFBM means) to get the old buggy Global Aliexpress-Version of ZUI and than rollback to ZUI 14 official?
[Lenovo P11] porphyrin:
I had the same result as TReddragon when I attempted to downgrade to ZUI 14 – Sahara error with QFIL. This is after using Windows Update to install the appropriate drivers and ensuring that the tablet COM port was discovered properly.
[Lenovo P11] LakersDroid:
You have Windows 10 or 11? It won't work on Windows 11. Also you gotta have all the proper drivers installed first for the QFIL program to downgrade flash successfully.

Also, if you're already on ZUI15 with locked bootloader, you can't downgrade. It had to be unlocked. On first pagez, there's a method where you contact Lenovo for the unlock code or something similar to unlock the bootloader first.
[Lenovo P11] meksis:
Hello. There is a ZUI 15 on the tablet, the bootloader is blocked. I got the image of sn.img on the Chinese website. And I can't flash it through fastboot. Has anyone managed to flash sn.img so that you can unlock the bootloader later?
[Lenovo P11] Alexislol2001:
Hello, I need help

My problem started a few days ago. I think it's possible that it was because I was using an application that demands a lot of graphic power, I was working with it and it heated up for a while until I was done.

The problem is that when I turn off the screen, it freezes and it's not that it turns off the tablet because to actually turn it off, it requires me to press the power button plus vol- button for about 13 seconds. And then to turn it on, just pressing the power button for 3 seconds already brings up the logo.

Also after rebooting, if I don't quickly unlock the tablet, it freezes either on the unlock screen or on the password keypad.

After unlocking, there is no problem as long as the screen doesn't turn off or if I want to turn off the screen, I leave music playing in the background and it doesn't freeze.

At first I deleted that app because I thought it might be because of it, I also ran the recovery mode graphical test since I read on the internet that it could fix it, but nothing. Finally today I saved the important data, proceeded with a factory reset and nothing.

What else can I do? I don't think it's because of update as I think in these last days there was no update.

What can I run in the background instead of music so I can watch videos and not have to continue the music? Something that runs in the background but consumes less than the music?

I'm thinking that it may be hardware damage, perhaps to the processor or RAM and that when they work minimally they may not work well(?).

If it is very likely to require hardware repair, I really don't know if better to do it or not, because I wouldn't like them to open my tablet, I don't know if they will do a reliable job and it will surely cost something.

So I think I'll keep looking for something that runs in the background consuming almost nothing.

I would really appreciate any kind of help or opinion.

BTW, a friend bought it for me in China, so it should be the original firmware, plus it only has Chinese and English.
[Lenovo P11] dy2592:
I had crashes as well but if you install the latest playstore apk from apkmirror it fixes the crashes.

Do you know why the bootloader was unlocked in the first place? Was it needed to install the custom firmware?

Im currently ok but I do see Netfli showing Widevine L3 and I too would like higher quality 1080p support.
[Lenovo P11] dilldoe:
Need some help. Just got the tablet and updated to android 13 and zui 15. everything worked fine then after a day or two the wlan just refuse to work. I've tried every method to try to get it working even doing a factory reset.

Anyone know how I can fix this so I can get wi-fi working again?
[Lenovo P11] ZhenMing:
The vendor need to unlock the bootloader to load witht he fake English ROM. And once the Bootloader is unlocked, the Netflix will only play at L3, until the Bootloader is locked with the certified default ROM from Lenovo.
[Lenovo P11] dy2592:
I see. So we cant just use some kind of adb command to relock the bootloader which I thought would just wipe everything which I am ok to resetup everything?
[Lenovo P11] oksza:
Don't really have much comparison with 14, but overall I'd say it's pretty good. An hour of YT at mid brightness costs about 10% drain which is acceptable.

Standby does not drain battery for over 10% in 24hs, and there's an option in settings (not sure it was there before) to turn off push notifications at night, so that's nice.
[Lenovo P11] TEK023:
I struggle to find any good screen protector that doesnt look blurry on taobao please help
[Lenovo P11] dy2592:
anyone know how to prevent apps from closing?

I have adguard, syncthing, textexpand, and bitwarden and they all get closed out by the system for some reason. Ive turned off battery optimization and locked the apps from being closed out in the recents menu but they still get closed.

Update: Someone suggested to try to disable and/or remove ZUI Security. via adb and it looks like that worked. So happy.

1. allow USB debugging

2. connect tablet to PC and run cmd

3. type adb shell

4. type pm list packages to see all install packages

5. type pm uninstall -k --user 0 com.zui.safecenter

Should say success
[Lenovo P11] Medo20:
Hello

is there anyway to flash rom with multi language support in menu ?

for TB-138FC it is only suppot english and chinese.

Thank you
[Lenovo P11] dilldoe:
is there a tutorial to downgrade back to android 12?

wlan is disabled in android 13 and so far I haven't find any way to turn it back on.
[Lenovo P11] Eduens:
Hello, I tried to flash my rom to the original CN rom, adn I got the Sahara error.

Now I can't do anything, It doesn't start anymore, nothing at all, looks like it doesn't even charge.

Can't do anything with android sdk commands aswell.

Is there anything I can do?

EDIT: Ok I was stuck in EDL, I had to press power and vol- for 1min

EDIT 2: Ok , I fixed the sahara error by clicking download right after entering EDL
[Lenovo P11] dilldoe:
Is there a way to flash/restore the firmware?

I tried lenovo's rescue & smart assistant but it doesn't work with USA version, not the chinese ones.
[Lenovo P11] dy2592:
Wondering if there will be any custom roms for our devices.
[Lenovo P11] bolino2k:
Hello,

EDIT: finally i successfully lock the bootloader, i can have Netflix on HD.

You have to apply all update of ZUI14, but NOT upgrade to ZUI15 .. after fully patch ZUI14, you can apply command fastboot flashing lock , and it's work

i received the TB138FC last week ..Global Rom, unlocked bootloader etc ..

I apply ZUI 14 with Qfil with link3 from this thread , all is Ok : tablet detects multiples patch and the last one ZUI15 .. but my bootloader is always unlocked ( i read ZUI15 sometimes lock the bootloader ..) ..

After that, i want to lock manually my bootloader to have netflix in FullHD/HDR ..

i apply command fastboot flashing lock , but after that, i have the message Corrupt / No boot ... and tablet start in loop in FastBoot menu

i have to unlock again with LockUnlockBootloader.zip script , and apply the command fastboot --set-active=a

then, after a factory reset , tablet start on ZUI15 ..

but my bootloader is still unlocked ..an no netflix in HDR/HD

I see ZUI15 can block relock of bootloader, so i try the same procedure but just after QFIl the link3 : so procedure failed with ZUI14 and ZUI15

I can't lock the bootloader like i can read in this forum ..

one strange thing is the Serial number on the bootloader menu : it's not the good one

for exemple here https://xdaforums.com/t/lenovo-xiaoxin-pad-2022.4465085/post-89226907 , the good one appears

i try to change serial in FPINFO with QFIL and change it to HAHAHAHA with special sn.img , i see on ZUI15 serial HAHAHAHA , but on bootloader, always the wrong one

Try command fastboot oem writeserialno HAXXXX , but message Command not supportes in default implementation

Is it possible i can't lock my bootloader because of this wrong serial number in bootloader ?( and tablet detects a corrupt installation ? )

thks !

hello,

see my recent post, i can't relock my bootloader ..can you tell me if in the BootMenu, your serial number is the real one of the tablet, or it's a fake one ?

thks

and you have relock your bootlader ? or stay with unlock bootloader ? thks
[Lenovo P11] oksza:
Yes, I think I even relocked on ZUI 15, after all the updates, bu I'm not sure.
[Lenovo P11] Brick Lord:
It seems all the links to EMMCDL_GUI are down, would you please share the program or at least the firehose file you mentioned here?
[Lenovo P11] dilldoe:
is there a way to back up my current image? android 13 and zui 15.

I'm planning to flash it back down to android 12/ zui 14, in hopes of getting my wlan/wifi to work again. BUT if it still doesn't work I want to flash it back to android 13/zui 15 since there is no way to do it OTA.
[Lenovo P11] mooms:
I have this one since august, it's good. Pick P11 Pro 2nd Gen 2022.

4,04€ 42%de réduction | Protecteur d'écran pour tablette Lenovo Xiaoxin Pad 10.6 pouces, en verre trempé 2022, pour Tab P11 Plus 11.5 2023 Pro 11 11.2

4,04€ 42%de réduction | Protecteur d'écran pour tablette Lenovo Xiaoxin Pad 10.6 pouces, en verre trempé 2022, pour Tab P11 Plus 11.5 2023 Pro 11 11.2

s.click.aliexpress.com
[Lenovo P11] bolino2k:
hello, apparently, in China, only few channels are available in Wifi 6 5Ghz: 36, 40, 44, or 48

can you test to change your wifi6 channel on your wifi router on 36 , 40,44 or 48 ..maybe it will work ;)
[Lenovo P11] itwigo:
i managed to run on my TB138FC : ZUI15 with Widevine L1 and locked bootloader on original CN ROM

I came from ZUI 14 original CN ROM with bootloader unlocked, then i've made all ZUI 14.0.x updates and locked the bootloader, then i've made ZUI 15.0.x updates

After, you can install an app called "Morelocale 2" using adb commands to convert 95% of the system to the language you want.

I recommend using Nova Launcher to get rid of the last bits of chinese text
[Lenovo P11] evertonmdz:
Could you share the solution found?

I managed to solve it with the vpn from the link above! Were you able to get Google backup working?
[Lenovo P11] ZhenMing:
Nope. Google backup just won't work...
[Lenovo P11] ZhenMing:
As I know, ZUI13 had the PC mode.
[Lenovo P11] Good Man1:
Thank you. you helped me alot!

Do you know how to answer another question I asked? Regarding global ROM?
[Lenovo P11] LastHope321:
I've got this model yesterday and I have been trying to find a global rom, the hardware is exactly the same as for the

Lenovo Tab P12 Pro Xiaoxin Pad Pro 12.6(*, **)​

which has a global rom, so probably it works for the P11 too.

Another confusing thing mentioned here is the support for the pen, last year's model which is also called the Tab P11 Pro works with the version 2 of the pen so be careful when ordering as it's easy to make that mistake. This model is supposed to work with version 3 (I don't know if you can still use version 2 tho)

* Except for the back cameras as far as I have been able to check.

** The link provided is for a store that sells the Xiaoxin Tab P12 Pro with a global rom as proof nothing else is intended.
[Lenovo P11] Good Man1:
Wow, this is a good update, have you tried to install this rom on Lenovo XiaoXin Pad Pro 2022 TB138FC (SD870)?
[Lenovo P11] LastHope321:
No I haven't, I was a little annoyed because the seller I bought the tablet from modified the tablet (to install google store and remove some of the Chinese apps) and didn't tell me so I made a factory reset and suddenly everything was in Chinese. So far I have managed to remove all of it so I'm not that interested anymore.
[Lenovo P11] LastHope321:
After a couple of days of using the device I'm adding some more information that could be useful to other people wanting to buy this model.

Geekbench 5:

This is an annoying problem I found which is that the screen is tinted on the edge.

This only happens when in total darkness the brightness is low, the hue is green , and also very low. This is common to happen when you see a movie at night and the screen gets black but it's not a real black. The color I see is grey and the band it's not so thick it depends on the hue value and the current brightness I use (This is how my phone took the image). It looks like the screen bleeding but it's not and apparently it's not a defect. This issue will also vary between units so maybe your screen doesn't have it or have it worse

https://www.samsung.com/ph/support/mobile-devices/green-tint-on-screen/
[Lenovo P11] tonychua:
The tinting also differs between 60Hz and 120Hz. Green tint on 120Hz 25% brightness.
[Lenovo P11] LastHope321:
Can confirm it is also different for me at 60hz and 120hz, in my case 60hz works better for low hues and low brightness.
[Lenovo P11] ZhenMing:
Some said there isn't any official Global ROM for this tablet. But we had people with 256 GB internal storage in Global ROM. I could not sure the SKU are the same.

In general, we are still searching for Global ROM for our tablet.
[Lenovo P11] ZhenMing:
Our OLED screen had this problem. But normally only appeared when in low light situation. My set having red patches. Do turn OFF the DC Backlight in ZUI Lab, which that could cause more obvious discoloration.
[Lenovo P11] Good Man1:
Maybe we can try the ROM of this model Lenovo Tab P12 Pro Xiaoxin (TB-Q706F)?
[Lenovo P11] LastHope321:
I'll try that another thing I have tried that works well too is to turn the screen to 60Hz instead 120Hz before watching a video. Let's hope lenovo implements automatic detection for media consumption in a firmware upgrade like other brands do
[Lenovo P11] LastHope321:
Geekbench 5:
[Lenovo P11] fry_35:
Hi all,

I am currently wondering which pad to choose between TB-J716F and TB138FC. Does the TB138FC, as its little sister, support widevine L1 for full HD Netflix streaming ?
[Lenovo P11] tonychua:
Yes, L1 and FullHD on Netflix.
[Lenovo P11] euphoriaaaa:
New Xiaoxin Pad Pro 2022 (SD870) user here.

Has anyone been able to turn off the keyboard click sound? Don't seem to see the option in settings.

Productivity mode removed is really a letdown as it looked so promising!
[Lenovo P11] Good Man1:
Did you manage to make a google account, or did you manage to make a global rom?
[Lenovo P11] dilldoe:
that's not the issue. it was working fine before, then after a day, the wlan just refuse to work. I turn it on in settings and it just gets stuck and the switch is kinda dark blue, disabled. So doesn't matter what channels I set my router to (which I tried) the tablet doesn't even turn on the wlan to even reach my router. Bluetooth works, the switch is blue when turned on. look at the pics