yashsingh1/xdaforums huggingface dataset:
[Android General] ZeroZChaoZ:
[IMG="What I see every ten seconds."]https://drive.google.com/open?id=0B-66UI_jT4SoUVItZWVTSGNPZ1k[/IMG]

Now it is in a full boot loop. It turns on, shows the Lenovo screen, then goes into teamwin and shows the running openrecovery script page and says.

Failed to mount '/data' invalid argument.
[Android General] MotoJunkie01:
So if it's going back into TeamWin, then recovery must have been flashed with twrp.img. One moment and I'll send you a link to my stock firmware to get your OS booting again.
[Android General] MotoJunkie01:
Ok. https://xdaforums.com/android/general/rom-lenovo-tab-3-8-tb3-850f-android-6-0-t3593043/page6

Download system.img and boot.img. Flash them both with TeamWin and that will get your OS booting again. Do a full wipe first in TWRP. Select Wipe, Advanced Wipe, then wipe /system, /data, /cache, /DalvikART.
[Android General] ZeroZChaoZ:
Ok. Well it is doing this boot loop every ten seconds. Ill need to know how to do that.

---------- Post added at 08:31 PM ---------- Previous post was at 08:08 PM ----------

Wipe Complete "Failed"

unable to mount storage

Failed to mount '/data' (invalid argument)

Full Selinux support is present.

Unable to mount /data/media/TWRP/.twrps

MTP Enabled

Failed to mount '/data' (invalid argument)

Failed to wipe davik

Updating partition details...

...done

Unable to mount storage

Failed to mount '/data' (invalid argument0

Failed to wipe davik

Updating partition details...

...done

Unable to mount storage
[Android General] MotoJunkie01:
Format /data and reboot recovery. Then try wiping again
[Android General] MotoJunkie01:
It is sounding more and more like your bootloader is still locked. Did you unlock it by following the precise directions in the OP?
[Android General] ZeroZChaoZ:
Ok. this is goodish I think. after pulling my SD card out and formating/ and doing thewipe. It said there is no os are you sure you want to reboot? And so now I am downloading the system.img

And the wifi here sucks so bad that it will take hours to download the system.img. But I have it started.

What should I do while waiting for the download?
[Android General] MotoJunkie01:
While waiting download boot.img, flash it to the /boot partition so at least that part is done. It's only 16Mb so it shouldn't take too long
[Android General] ZeroZChaoZ:
Done with the boot.img the system.img is at 460mb out of 3gb. Thank you so much for your help. I hope we get this done right this time.
[Android General] MotoJunkie01:
Flash system.img when downloaded. Reboot system. Enable Developer Options, then OEM Unlocking & USB Debugging. Then boot back into TWRP, flash SuperSU zip and reboot system again.

First boot after flashing root can take several minutes so just be patient and don't interrupt the process.
[Android General] MotoJunkie01:
[MENTION=8439317]ZeroZChaoZ[/MENTION], did you get it fixed?
[Android General] ZeroZChaoZ:
@_@ Not yet still downloading.. 46kbs at a time. >,< This wifi sucks so bad.. Nevermind it just faild. Ill have to start it over. I will get back to you with the resaults. Thank you for all the help and patience.
[Android General] MotoJunkie01:
I feel your pain. I lived in an area not too long ago with extremely bad cell coverage and low download speeds. Frustrating to say the least,
[Android General] ZeroZChaoZ:
Ok. I got the system.img.win file. is it a problem that it is .win? Im not sure. Should I just flash it?
[Android General] MotoJunkie01:
Just flash it. Same as an img
[Android General] ZeroZChaoZ:
The system.img.win file isn't showing up after clicking Install and going to the file path.
[Android General] MotoJunkie01:
Ok. Place the file on your PC. Change the file extension from .win to .img. Your filename will be system.img.img, which you can then change to simply system.img. Place the file back on your external SD, select install and image option in lower right of screen, then it will show up.

(You must copy the file to your PC before you can change the extension. )
[Android General] ZeroZChaoZ:
IT LIVES!!!!

It's working great. All done. ROOT access is active! Thank you so much for everything. You Rock! And this site is the bomb. Thank you again.:good::D:o:fingers-crossed::laugh::victory::highfive:
[Android General] MotoJunkie01:
So glad to hear it. I was just thinking of you and looked and saw your post. :good:
[Android General] ZeroZChaoZ:
I am only running into two problems. Fist is that there is a system update to TB3-850F_S100030_161209_ROW.

And it fails to install the update. Im not sure why.

And the second is that I am having trouble finding a way to move apps to the sd card. witch is my main reason to root. :eek:
[Android General] MotoJunkie01:
On the OTA update, you must first install stock recovery have an unmodified boot and system images.

Have you tried formatting your SD card as adoptive storage?
[Android General] ZeroZChaoZ:
Ok. So, since I just did all of this to the tablet I can't get those updates. As for the sd card and formating it as adoptive. the talbets system doesn't have that option. so I didn't try it. I had tried to format it as internal storage but when I do the tablet says that it is corrupt. though I know it's not. But aside from all of that. When I format the sd as portable it works fine. My next and more importent pain in my but has only just showed its face this morning. For an unknown reason the tablet is rebooting itself after being on for only two minutes.. IDK what to do.
[Android General] MotoJunkie01:
Reflash boot.img, install the root zip script again, then the random rebooting should stop. As to your SD card issue, install a third party app like Apps2SD and that should give you the flexibility you want with external storage.
[Android General] ZeroZChaoZ:
Ok. So I was a bit impaciant, and the rebooting was too annoying. So I backed up my account and factory reset the tablit. This did break the root but also stoped it from rebooting all the time. So is the custom system.img rom still on it? Should I still fallow these new instructions you just gave? Or is it safe to just flash the root.zip script again? I have enabled the developers options, usb debugging and all that.
[Android General] MotoJunkie01:
Make a Nandroid backup of your present /system & /boot. Instead of using the root zip in the OP, flash the up to date v2.82 version. Then, if anything goes wrong, you can do a full wipe and restore.
[Android General] ZeroZChaoZ:
Ok. Im making the backuo now. But I don't think I have the v2.82 version downloaded. and my wifi took two days to downlowd the system.img. So were do I get the v2.82 file?
[Android General] MotoJunkie01:
http://www.supersu.com/download

Using this link will always provide you with the most current version of SuperSU. Also it is a very small download size.
[Android General] ZeroZChaoZ:
Ok. when flashing the latest .zip it fails saying that the zip file is corrupted.

Do I need to start from step one or something?
[Android General] MotoJunkie01:
Try downloading the zip again, boot into TWRP, wipe cache & dalvik/ART, then select install and flash the zip. It probably got corrupted during download. In fact, if you want, just flash the SuperSU v2.79 linked in my tutorial. Google Play will update it to v2.82 anyway once you boot into the OS.

Make a Nandroid backup of your current setup (system & boot) and you should be fine.
[Android General] yiukiang:
i was stucked on " fastboot boot twrp.img" command , i dont have twrp.img to install ...

now it was starting on logo Lenovo and stuck there forever .. any suggest ?
[Android General] MotoJunkie01:
You need to get in fastboot mode by power button and volume button combinations. Read this thread by [MENTION=8243079]r&xp[/MENTION] for an excellent explanation on this.

https://xdaforums.com/android/help/lenovo-tab-3-8-tb3-850f-unbrick-root-t3598727
[Android General] yiukiang:
thanks God, and I escpecially thanks appriciate you very very much for guiding me to that thread .... Finally my tablet was saved from brick....

Thanks alot .... I just wanna cry :crying:
[Android General] pndwal:
To download and install 850F_S100030_161209_ROW:

Go to Lister's thread, end of post 66. I've posted link to latest stock 850f rom:

https://xdaforums.com/android/help/lenovo-tab3-8-2016-custom-recovery-t3483454

Info here too:

https://xdaforums.com/thinkpad-tablet/general/lenovo-tb3-850f-root-t3397017/page3

The file comes with the drivers and spft needed.

I use adoptive storage and it works fine-

(After formatting as adoptive-

go to settings, storage, SD card, and migrate data. SD card will not show up on PC if this is not done. With adaptive storage only one memory will show up, the one with the migrated data, ie your user accessible data.

Also, go to settings, storage, internal storage, apps, then select individual apps and click Change Storage (set to SD card for any with Change button available.)

You will only make full use of adoptive storage if you take these two steps. Also, once done, internal storage will be reserved for unmovable data, and newly installed (unmoved) and unmovable apps only.)

Hope it helps you, PW.

About This File

Lenovo Tab3 A8F - firmware TB3-850F_S100030_161209_ROW

Creator: Lenovo

Build Date: 09/12/16

Firmware type: Firmware for PC

File size: 1.14 GB

Archive password: lenovo-forums.ru

OS: 6.0

Description:

android 6.0

AOSP

Kid mode

ONLY WLAN!

Firmware for the Euro-region (including Russia and Ukraine)
[Android General] krulez6:
Hey guys,

I just bought a TAB S8-50F in China and I am trying to install a new ROM. However, following the steps described here, it does not work for me.

The problem already starts in the first step, somehow in my version the UNLOCK OEM feature does not appear in the developer options. I have been updating the system but no luck. I guess this is the reason that when I am in bootloader, it won't pick up any further ADB comments (when I type fastboot oem unlock it keeps saying <waiting for any device>).

Does someone has any suggestions? Many thanks!

Model number: tab s8-50f 16gcy-cn

Android: 5.0.1

Kernel: 3.10.20

Build number: S8-50F_S000461_151111_PRC

Software: S8-50F_150821

My own bet is that it has to do with the PRC build number.
[Android General] MotoJunkie01:
I can only confirm that this guide works for the U.S. variant of the TB3-850F, on Android Version 6.0
[Android General] MotoJunkie01:
Due to apparent issues with the steps in this guide, I went out on payday and purchased another TB3-850F which was on sale at Office Depot. I followed the exact steps in this guide to the exact letter. The result was: TWRP and root access without as much as a single glitch. Ironically, the very next day, a colleague at work had just purchased a TB3-850F and wanted root & custom recovery. Once again, I followed these steps exactly and, once again, no problems at all -- root & TWRP. So I've made this determination by process of deductive logic: any issues encountered installing TWRP or SuperSU as a result of this guide are the result of user error -- a failure to follow the instructions exactly.
[Android General] Portal_Gun:
Anyone here have new Tab 4 8 Plus ? Does this method work ?
[Android General] MotoJunkie01:
This method has only been tried & verified on the TB3-850F.
[Android General] jani0417:
Any way to root the device without a pc or kingroot?
[Android General] MotoJunkie01:
In theory, and because the Android Security Patch Level of the stock OS is before December. 2016, the Dirty Cow privilege escalation exploit could be used to gain temp root/adb root shell. In turn, a root.sh script could then be ran/pushed by terminal emulator. However, any of the theoretical methods just mentioned would be completely useless without the ability to flash a custom recovery or a patched boot image for full syztemless root access. Please remember, the bootloader is locked, thus preventing the /boot and /recovery partitions from being flashed without first unlocking it. This of course requires the execution of ADB commands via PC environment.

I have recently been experimenting with the Magisk Manager on this device. Instead of my previous method of flashing a SuperSU systemless root script through TWRP recovery, my Tab 3 is currently rooted with MagiskSU v14.0, which I installed from the Magisk Manager on-device, without using custom recovery. My experience thus far with MagiskSU has proven much smoother and less problematic than rooting with the SuperSU binaries. Not only does MagiskSU provide full root access, it further gives the advantage of an entire Universal Systemless Interface for the stock OS, full patched boot image support with disabling of forced encryption & dm-verity, the ability to hide the SU daemon from /system & user applications, and a myriad of built in & ready to install Magisk Modules, which range in features from audio tweaks to SystemUI theming.

So to go back to your initial question regarding a root method devoid of a PC or Kingroot, I'm afraid I can't offer much in the form of fesibke ideas, due to the fact that the bootloader needs to first be unlocked using a PC & ADB commands. But, as an alternative to my original method of installing the SuperSU binaries via TWRP, I am now using the MagiskSU root binaries and Magisk's encompassed Universal Systemless Interface, and I will now be recommending rooting with MagiskSU hence forth.
[Android General] justtryingtofigurethisout:
I have pasted it everywhere but twrp.img "cannot load" is there a specific folder it should be in so that it can find it?
[Android General] RBraverman:
THANK YOU MOTOJUNKIE + and adition

First I can not thank Motojunkie for is write up/post/files. Where can I?

Just did this and, but for one small item, worked fine.

When flashing TWRP with 3.1.x it will ask where/which partition to flash it to, just in case there is anybody who doesn't know - in which case maybe they should not be doing this - check the recovery partition.

Also, after unlocking the bootloader I could use the Vol keys to do ANYTHING. Powered down and after the second attempt reboot to system and was unlocked.

This may become a well read thread as the is a "Business" on eBAY selling refurb's for $70.00+ us.
[Android General] MotoJunkie01:
Lol. Are you saying my instructions were good or bad? I couldn't make out the gist.
[Android General] RBraverman:
HAH! Naw, I didn't see in the instructions, I obviously could very well have missed it, that the newer version of TWRP asks which partition to flash itself - never noticed that before.

BTW, I just tried to get into TWRP, rebooted, holding Vol +/ and got several lines of Chinese all over the place. Was able to power-down and boot back up, but not into TWRP - ideas? Do I need to start from shutdown? I don't wanna try this again just in case - OH BTW I ah, don't read Chinese.....

Actually turns out I held the vol-dwn - always get them confused - but holding Vol-Up/power just boots into the system. If I hold down the 2 buttons after the orange Lenovo logo appears, just reboots.

I me stumped.

*****************

Of course I could adb reboot recovery, but what if there is nothing there? Is that possible?
[Android General] MotoJunkie01:
I would recommend this guide which will get you back to pure factory stock condition. Then retry root and TWRP.

https://xdaforums.com/android/help/lenovo-tab-3-8-tb3-850f-unbrick-root-t3598727
[Android General] RBraverman:
I probably will just live with this, I mean it's rooted and works dandy.

It's taken me a week or two to get it the way I want - just to back it up, I'll take my chances.

REALLY do not want to start over, but thanks for the link.

Which I just read, and found that the writer also has problems booting/getting/rebooting into recovery. Suggested Root Essentials, I found QuickBootPro, and booted into TWRP.

Joy.

THANK YOU, which I wanted to do in the first post but can not find the thanks button anymore. Where's Waldo?
[Android General] TapaSte:
Is there a specular guide usable for Lenovo Tab 3 Plus (TB-8703F) ?

Regards.
[Android General] RBraverman:
Sorry, what kind of guide?
[Android General] TapaSte:
[emoji15]

https://xdaforums.com/showthread.php?p=72113111

Sent from Lenovo TAB3 8 Plus
[Android General] RBraverman:
Ok ..... that is a guide, yet you are ASKING for one.

Sorry but what in h**l am I missing? I'm assuming this is obvious, and I'm the only one missing the point.
[Android General] TapaSte:
Your missing point is that I was asking for a guide useful for a Lenovo Tab 3 8 Plus (tb-8703f).

[emoji55]

Sent from Lenovo TAB3 8 Plus
[Android General] RBraverman:
See, I told I missed it - just re-read your post - AGAIN - and it's right there.

Apologies, but I do not see one, did a search.

Back into my hole.
[Android General] TapaSte:
I really don't understand what is wrong.

However... As not said. Have a good life.

Bye.

Sent from Lenovo TAB3 8 Plus
[Android General] Zarosky:
One cuestión, this twrp work on tb3 730F?
[Android General] MotoJunkie01:
I cannot say with any certainty. I can verify that it works on both the TB3-850F and the TB3-850M variants of the Lenovo Tab 3. What is the SoC of the TB3-730F?
[Android General] MotoJunkie01:
Updated Stock 6.0 ROM posted. Force encryption and dm-verity disabled. TWRP flashable zip.

https://xdaforums.com/android/general/rom-lenovo-tab-3-8-tb3-850f-t3617594
[Android General] Zarosky:
thanks. Flash twrp for tb3 730X in tb3 730F and work!
[Android General] Hemphiz:
Good stuff! Maybe this thread should also add the device in the title ;)
[Android General] MotoJunkie01:
Yeah, and I'm pretty sure somebody confirmed that it works on the TB3-850M also. In fact I think our TWRP was intended for the 850M. I should probably add those two devices.
[Android General] pishcakes:
Hey, just a heads up OP, in the guide it says to correctly choose "boot" when TWRP asks where to install. I did just that, but it replaced my original boot.img with twrp.img, so now it just boots to TWRP whenever trying to boot. I found the original boot.img and reflashed using the twrp.img on my pc to replace the one installed on the device. It now boots. Hope this helps anyone that can get only TWRP after flash. Make sure to select "Recovery" when it asks where to install. Great guide BTW. Have a nice day!
[Android General] MotoJunkie01:
Good catch. I've corrected Step 2 to correctly reflect "recovery". Thanks for the heads up.
[Android General] pndwal:
Is TWRP referenced here actually v3.0.1? Mine is v3.0.3. PW
[Android General] MotoJunkie01:
I have 3.0.1, 3.0.1-r2 and 3.0.3. All perform with pretty well the same functionality from what I've experienced. I'm in the works of rebasing TWRP up to the most current version. I'll include all necessary upstream security patches as well as some minor bug fixes. Hopefully, in a few days when I release my beta stock-based custom ROM for this tablet, my upstream rebase of TWRP 3.1.1-r1 will be ready to post as well.
[Android General] MotoJunkie01:
Latest stock build is up. TB3-850F_S100031_171010_ROW, which includes some stability improvements, minor bug fixes, and Google security patches dating up to 9/05/2017.

https://xdaforums.com/android/general/rom-lenovo-tab-3-8-tb3-850f-t3617594
[Android General] canodroid15:
[MENTION=7383447]MotoJunkie01[/MENTION] just out of curiosity, have you ever attempted to compile LOS or AOSP for this tab? My son has one & I'm thinking about looking into it. I'd also like over clock this thing a bit. You seem to know the tab pretty well.
[Android General] MotoJunkie01:
I've thought about trying to port LOS/CM 13 or maybe even LOS 14.1 over to this tablet. CM 13 preferably, so we could have the CyanogenMod Theme Engine. Let me know if you're interested in helping on such a project. Thanks.
[Android General] canodroid15:
Cool, I'll have to look into it. I've been working a lot lately & my time is slim. I may have the weekend off so I can dig around. I think cm13 would be a good start especially since the tab is currently on marshmallow :)
[Android General] MotoJunkie01:
Yeah I was thinking along the same lines: the SDK and ROM platform will stay with MM, so there shouldn't be a lot of overhauling involved in porting CM 13.
[Android General] canodroid15:
The initial bring up for Cm or LOS13 is where the time & headaches come in. It'd be nice if we could find a similar device with the same or close to the same chipset that already has a working LOS custom ROM. I'm going check around this weekend to see what I can find. I know quite a few talented devs that would help us out as well if it's possible. I'll keep in touch [emoji106]
[Android General] MotoJunkie01:
I had the exact same thing in mind. Things would be greatly simplified if we could find a CM/LOS based ROM already being used on a device with the MT6735m board platform. I'll check and see which devices have our chipset and any custom ROMs which are available for any such devices.

Update: after some searching, I found that the Alcatel Pixi 4 5"/5045X/5045A, like our tablet, is powered by the MediaTek MT6735m chipset. I've found a CyanogenMod 12.1 build for the Alcatel device, as well as an up-to-date TWRP build. While I don't necessarily like the idea of downgrading to a Lollipop based ROM, I do like the idea of a lot of customization flexibilities. I'll take a preliminary look at the CM build and see how tough a port may be. I will keep you updated.
[Android General] MotoJunkie01:
I've looked over the framework of a couple of CM builds for the mt6735m SoC. The only OEM type mod that I see we will need is an addition to the navbar for our extra button on the far left which provides various screen tints. However, as an alternative, this feature could be implemented into Settings>>Display.
[Android General] stephenwhite:
Lenovo TB3-850M loop(boot-->logo-->TWRP logo-->TWRP install script)

Hi all,

I followed the instructions on the web to root my TB3-850M:

1) enable oem unlock (ok)

2) reboot to fastboot mode (ok)

3) fastboot oem unlock (ok)

4) fastboot flash recovery twrp_3.0.3.img (forgot reboot system after oem unlock)

now my TB3-850M boot loop in (boot-->logo-->TWRP logo-->TWRP install script)

cannot enter fastboot mode again. How can I flash back to stock rom?

Thanks
[OnePlus 3 Questions & Answers] Sipheren:
Just a small issue with some apps and the software buttons, they seem to overlay the app and hide some of the options. The main culprit for me is Snapchat.

Has anyone noticed this or found a fix?
[OnePlus 3 Questions & Answers] F4uzan:
Apart from actively hiding and showing the navigation bar, there's not much you can do. It's mostly the app's fault at best.
[OnePlus 3 Questions & Answers] vuP22:
I'm on resurrection remix rom and have the same issue with Snapchat. Fix would be nice
[Mate 8 General] darbylonia:
If you are in nyc area, I will pay you $100 to help me unbrick my Mate 8 and install KangVIP. I am not having any luck on this device - though I have rooted and flashed for many years. I may sell this thing and just sell out for the Pixel.

Please PM me if you are around NYC and interested. Thanks.
[Mate 8 General] darbylonia:
I'll even send the device to someone fairly locally who can help me!
[Mate 8 General] darbylonia:
SUCCESS: And here is my story. Girls can fastboot, wipe, install, flash, too! Yeah!!!!!!!!!!!!!!!!!!!!!

https://xdaforums.com/mate-8/development/rom-kangvip-slim-t3318572/page373#post71121308
[Mate 8 General] franzyroy:
Do you underestimate the girls at this point? :confused:

Intelligence isn't a factor x or y. :highfive:

I love my daughter but it's not because she's smart ... yet she is! :victory:
[Mate 8 General] Nirak:
[MENTION=4034484]darbylonia[/MENTION] ....from one girl to another....LOL.... no better education then a (half)bricked device. Yes, Mate 8 is quite another story then Nexus 6 :))
[One (M8) Q&A, Help & Troubleshooting] justinchao740:
I am having a big battery drain by media.extractor. I'm currently running Android 7 aoscp with team m8 kernel. It started happening for no reason. If anyone know what that is our how to fix it please help.
[One (M8) Q&A, Help & Troubleshooting] cezarvrabie:
I would also like to know. I have the same problem for the last few days. I have an OP3 though, running on 7.1.1.