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[GUIDE][TB3-850F/M] Lenovo Tab3 8 | Factory Firmware Restoration Guide

Lenovo Tab3 8​Model No. TB3-850F/M
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Factory Firmware
Restoration Guide
​OVERVIEW
There are a number of methods that can be used to restore the factory firmware on the Lenovo Tab3 8. The method used in this guide is undoubtedly the simplest, quickest and most efficient. We will be using the Lenovo-Moto Rescue & Smart Assistant (RSA). The RSA is a Windows-based proprietary software suite and factory firmware restoration solution, developed and released by the Lenovo/Motorola Mobility conglomerate. This PC client software can be used to restore virtually any smartphone, tablet or smart device manufactured by Lenovo or Motorola over the past several years. The RSA installs and configures the latest USB device drivers on your PC or laptop, matches your device with the most current official firmware available, downloads the firmware package, and then uses a chipset-based flashing protocol to install the firmware. An invaluable feature of RSA is its ability to flash the Tab3 8 from a powered-off state (BROM mode) on tablets that are bricked and thus incapable of booting into the Android OS, fastboot mode, or recovery mode.
COMPATIBILITY & REQUIREMENTS
The RSA software will run on Windows 7, 8.1, 10 or 11 (64-bit). Lenovo lists a minimum CPU speed of 2 GHz and a minimum of 2 GB RAM to ensure RSA compatibility on your PC or laptop.
You will need a reliable internet connection to use RSA, an active Lenovo user account (free & quick to set up), and the factory supplied or a quality equivalent USB-A to micro USB syncing/charging cable.
This guide can be used for firmware restoration of either the WiFi-only model (TB3-850F) or the 4G-LTE supported model (TB3-850M) of the Lenovo Tab3 8. ​
RSA INSTALLATION & SETUP
Download the RSA software client from the link provided below onto your Windows PC or laptop. Double click the .exe installer and follow all prompts to install the RSA software. During the installation, the RSA software will also install the latest USB device drivers on your computer. Upon the initial launch of the RSA client, you will first be be prompted to agree with the terms of use and the privacy policy. Check the appropriate box and click Continue. Next, you will be prompted to sign in to your Lenovo account. Go ahead and create a new account if you do not already have one. It's completely free and only takes a moment to create. ​INSTRUCTIONS
Once signed in to your Lenovo account, the RSA software will open to the main screen. Click on the Rescue tab located in the upper-left of the interface​
Next, click the Tablet option. You will now be prompted to submit your tablet serial number so that the client can locate the correct firmware for your model. To skip this, click the option titled How to find SN?, then click the arrow on the far right titled More​
Next, click the option titled Manual Selection located in the lower-right of the window​
Now you will be prompted to Select the name & model of your device. In the upper box, use the pulldown menu and select Lenovo Tab3 8 from the list of devices​
In the lower box, use the pulldown menu and select either TB3-850F (if you have the WiFi-only model) or TB3-850M (if you have the 4G-LTE supported model)​
The RSA will now list the most current firmware build available from Lenovo's software support servers. This will be listed as the Target Firmware​
After ensuring that the target firmware listed matches your device model, click the orange Download tab​
The RSA software will now download the firmware package and sone additional software components needed to flash your device. Ensure that your tablet is in a powered off state​
Once the files are downloaded, click the Start Rescue tab. Follow the on-screen prompts for instructions on connecting/disconnecting the tablet to/from your computer​
The restoration process generally takes just over five minutes to compete. Once the RSA client provides a restoration complete notification, simply power up your tablet like normal​
That's it. Your Lenovo Tab3 8 should now be reverted to its unmodified stock state and running on the most current factory firmware build. ​
DOWNLOADS
• Rescue & Smart Assistant v6.5.2.22
• Official Lenovo RSA Software Releases
• RSA User & Info Guide (English, PDF)​

Boot Loop / Checksum Error when trying to root (Umidigi A7 Pro).

Spoiler: Phone Data:
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Hi Guys,
I'm super new to the whole topic and am only doing this because I have a spare smartphone and wanted to learn something.
The bootloader is unlocked.
The USB drivers are installed on the PC.
USB Debugging is turned on.
Smartphone states "Orange State [...]" while booting.
Then I tried to extract the boot.img via the "MTK Droid Root & Tools v2.5.3" to flash this later with Magisk. But here I got the following error message:
Spoiler: MTK Error
The same messages have been there before I did anything on the smartphone for the first time.
From DE to ENG:
--->>> Connect to device <<<---
--- ERROR: --- TotalBytesPerChunk Not Found. Set default Page/Spare=2048/64 !!!--- unknown ROM structure, backup NOT possible!ATTENTION! a file (/system/recovery-from-boot.p) which restores the stock recovery in case of normal phone startup was found!
So I flashed a stock rom here from
Spoiler: link
Umidigi A7 Pro Stock Firmware ROM (Flash File)
Download Official Umidigi A7 Pro Firmware (original flash file) without any password for Free. We also provide the Stock Rom for other Umidigi devices.
xdafirmware.com
to the phone via the SP Flash Tool (because I did something that enabled the first Boot Loop), the phone restarts in factory state succesfully, I set it up once and then installed Magisk, and using Magisk patched the boot.img of the from I downloaded.
However, when I now want to flash it via the flash tool, this error message appears:
Spoiler: Flash Tool Error
And suddenly I am in boot loop. As soon as I flash the original boot.img, the phone starts as usual.
I have also tried the whole thing via TWRP, and as soon as I install Magisk.zip via the TWRP the boot loop angers me again. Also MTK still shows the same error.
Spoiler: I have followed the following instructions:
Main Guide: https://www.getdroidtips.com/root-umidigi-a7-pro/
Helping Video:
Spoiler: Magisk log
I'm happy about anything that helps me out getting this phone rooted

Sorry my friend that noone has yet to have replied to your inquiry here. Ill do my best to give you some of the knowledge I have when it comes to setting you in the right direction without failure next time. Today and for the last month or so I have been working hard with the Umidigi a7 pro 64gb. To be clear are you making sure to flash the magisk zip file of the boot.img file that you saved from the stock firmware. You shouldn't have to fiddle around with to many of the settings just when you do flash the patched file you have to make sure to uncheck everything other then boot.img patched file. I am very new to this as well and honestly it's a tricky process to get it ever done right on your first attempt. You seem to have and know enough knowledge on this topic. MTK is a finnacky processor. I myself have yet to get this device fully rooted yet. The issue I myself have is my PC is not properly updating the MTK and other drivers to make the magic happen which I think I am just going to have to get my other dell going again to try on a fresh PC that I just set up again for this exact thing. To my most recent knowledge though when it comes to the Umidigi a7 pro you have to follow each and every step closely and to a exact precise t or the whole operation will fail every time you try. Are you using your micro SD card to it's full potential and making sure that you saved the patched file properly. You also have to watch for corrupt files when it comes to this kind of thing. But you know enough to just trust the pages you are downloading your files from and make sure everything is signed and legit. Another thing is what seemed to help me is removing SP flash tool completely from my PC. Then re downloading it and starting from scratch by flashing your stock scatter file and I find when flashing hold the power button when it starts for just a few seconds only some people think to keep holding the power button through the entire flash process but to my knowledge what has worked from a noobs perspective is hold power for just a few seconds until the full load of the red bar comes and then when it goes away you can let go of power button and it will continue on with the rest of the manual installment process. There are a lot of high technical highs and lowes when it comes to what you can do here and from the info I've gotten MTK devices weren't really meant to be able to withstand even being remotely compatible devices for root. Honestly let me know how things are going lately for you as I know this post is a bit old. I myself have came close to periodically throwing this phone as far out of the window as it can reach, I'm not a quitter by any means and still today and even right now m working on that to try to help others in any way i possibly can and today I will get this device into full root accesss.

Guide to Test Android 13 DP1 (lvm600am)

This restore process is intended for the AT&T V60 (lmv600am) model and will most likely WIPE your data so back it up if you want to keep it!
This process will restore the lmv600am to Pixel P4a a13 dp1. I’ve dumped all the required partitions from my lmv600am which has been running this rom for about a week now. I have yet to find any problem at all. To me it seems smooth and fast. This process uses the Qfil utility and assumes you already have a working knowledge of Qfil and that you have already installed it on your Windows PC. If you don’t have that knowledge start reading. The internet is full of Qfil guides.
You can’t damage or fix your existing imei relevant partitions from this restore because they aren’t included in this download.
You are responsible for backing up your existing phone partitions. I’m not liable for you using my work product and you do so at your own risk. If you’re unsure of what you’re doing then read more about Qfil and what is does. Again, if you are a newby go slow. Taking your time will save you a lot of aggravation.
This process will not fix your erased or damage imei number problem. There are process out there for that but they are usually reserved for people with an expert level of knowledge on the subject.
This guide is for anyone who’s presently wanting to try Google’ new Android a13 dp1 release. I have only this when my phone was already on an Android 11 rom. That’s not to say it won’t work coming from an Android 10 rom but I haven’t tried it.
I strongly suggest that you run the “reset option” option from Settings>System>. This will completely reformat and wipe your userdata when completed. No need to go thru the setup process just put phone in edl (9008) mode.
Steps
Download “Lmv600am a13 dp1 P4a Restore Partitions.7z” file from here and unzip. Remember the unzipped restore directory path.
Plug your phone into PC with USB cable and put you phone in EDL (9008) mode. Again, there are guides on how to do this everywhere.
Start Qfil and select the port of your phone’ connection. (See Windows device manager)
Select the v60 firehose (.elf) which is included in the unzipped directory.
Select storage type = ulf which is located at the bottom right of the Qfil dialog screen. I’m using Qfil 2.0.3.5 version. The correct version of Qfil is important as there have been problems with older versions.
Next click on the “load XML” button and group select “rawprogram0” thru “rawprogram6” which are also in the unzipped directory, then hit OK. Next it will ask for the Patch0.xml file, hit cancel as we’re not patching anything.
Wait a few seconds and then click on the “Download” button. Qfil will now resolve all the names of the partitions to be restore and then start the download process to the phone.
When complete phone reboots as I recall.
If you wish you can Qfil load both the eng alb file to abl_a – abl_b which will give you Flashboot mode and your magisk modified boot.img to boot_a – boot_b to give you root. I have both.

When I click download it just gets stuck. There is no ulf storage type on my qfil. Maybe I have the wrong one? I only get ufs and a few others.
edit I guess I bricked it, my other lg v60 works fine lol
nvm again used my laptop. that fixed it. Nice build

does the qdac works?

I update Android 13.How can I restore to origin lg system? It can't work as update steps.
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ck5524209 said:
I update Android 13.How can I restore to origin lg system? It can't work as update steps.
View attachment 5562119
Click to expand...
Click to collapse
If you wish to restore to the original AT&T a11 system for lmv600am go to the guide in this forum which I provided. It is meant for this exact circumstance, to enable those that wish to test what they like when they like and then return to a stock a11 environment when they wish.

[GUIDE][FIRMWARE] Hyundai 7" HyTab Plus (7LB1) 4G-LTE Tablet | Stock Firmware Restoration Guide

Hyundai 7" HyTab Plus
4G-LTE Android Tablet
Model No. 7LB1
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Factory Firmware
Restoration & Upgrading Guide​
OVERVIEW:
This guide outlines detailed instructions on restoring and/or upgrading the Hyundai 7" HyTab Plus (7LB1) tablet to its stock factory state by way of flashing a factory firmware package to the device. This procedure can be used to fix a tablet which is bricked, stuck in a boot loop or is otherwise unable to boot into the Android OS. This guide can likewise be used by device owners who are experiencing issues attributed to firmware corruption, those who simply wish to revert to a fully stock and unmodified Android OS, or those who wish to upgrade from an older firmware build. This process will remove any system level mods, root binaries, custom kernels, recoveries, etc., as well as lock the bootloader if it is in an unlocked state.
FIRMWARE INFO:
• OS/Version: Android 10 (Go Edition)
• Build No. full_tb8765ap1_bsp_1g-user
• Build ID: QP1A.190711.020
• Build Date: September 19, 2020
• Security Patch Level: June 5, 2020
• Build Type: User
• Build Tag: release-keys
• Kernel version: Linux 4.14.141
• Radio: MOLY.LR12A.R2.MP.V135.8
• Custom Build: alps.mp.q0.mp1-V9.82
• API Level: 29
• Partition Scheme: Dynamic (non-A/B)
PREREQUISITES: ​
A PC or laptop running on Windows 7/8.1/10/11;​
The SP Fladh Tool firmware flashing software (link provuded below);​
A factory firmware package for the 7LB1 tablet (link provided below);​
The vCom MediaTek USB drivers installed on your Windows computer (link provided below);​
The factory supplied or a quality equivalent USB-C to USB-A data syncing cable.​
INSTALLING MEDIATEK vCOM DRIVERS
The most common obstacle many members encounter when using the SP Flash Tool is device recognition. The SP Flash Tool software flashes firmware directly to the NAND/eMMC whilst the mobile device is in BROM flash mode. In other words, the flash tool is interacting directly with the MediaTek chipset during the flashing process. The user merely needs to connect the powered off mobile device to the PC or laptop using an adequate USB data syncing cable. SP Flash Tool, in turn, will initiate BROM flash mode on the mobile device and commence with the firmware restoration process. In order for your device to be properly recognized in this regard, it is crucial that the MediaTek vCom USB drivers are properly installed and configured on your Windows computer. While I will not be outlining step-by-step instructions here on installing these drivers, I have provided a link in the downloads section below for a comprehensive guide on properly installing and configuring the vCom USB drivers on your Windows machine. Once you have completed this crucial task, you may proceed with this guide. Be sure and thank the OP of that guide, @skeleton1911, if you use his work.
DISCLAIMER
This guide involves flashing the eMMC internal storage device of your tablet with a factory firmware package, thus fully restoring your tablet to its stock factory condition. The procedure outlined below is inherently risky to the overall integrity and operabilitu of your tablet. Failure to follow the instructions properly can, for instance, render your device completely inoperable. By proceeding further, you are assuming sole responsibility for the integrity and operability of your tablet. I have fully tested this procedure on my own device. Follow the instructions carefully, employ patience, and things should go smoothly. I am not responsible if you brick or otherwise damage your tablet. Moreover, it should be emphasized that this guide is for model 7LB1 only. Its sister tablet, the WiFi-only 7WB1 model, incorporates major hardware and firmware differences. Accordingly, these two models are not intercompatible with regard to firmware builds. ​
INSTRUCTIONS
This section presumes that you have properly installed & configured the latest MediaTek vCom USB drivers on your Windiws PC or laptop. Again, I have linked a guide for installing these drivers in the downloads section below. Your bootloader does not need to be in an unlocked state. However, this procedure will relock your bootloader if it is presently in an unlocked state.
WARNING: This procedure will erase all saved user data from your device. Before proceeding, make a backup of any files, media or data that you wish to preserve.​
Download the 7LB1 factory firmware package from the link below and extract the contents of the archive to a folder on your computer desktop, or to a folder in another convenient directory;​
Download SP Flash Tool v5.1924 from the link below and extract the archive to your desktop, or to another easily accessible directory;​
Ensure that your tablet is powered off and is not connected to your PC or laptop;. Likewise, ensure that there are no other mobile devices or USB storage devices connected to your computer;​
Open the SP Flash Tool folder that you extracted in Step 2. Click on flash_tool.exe, then right click and choose to Run as Administrator;​
Ensure that the pull-down menu, located near the mid-left region of the interface, is set to Download only. Next, click on the Choose folder icon, located to the right of the Scatter-loading file heading.​
A file explorer will be launched. Navigate to the saved location of the firmware you extracted in the first step. In the firmware directory, select MT6739_Android_scatter.txt and then click Open;​
The SP Flash Tool will now load the factory firmware package. A violet-colored progress bar near the bottom of the interface will reflect the completion status.​
Once the firmware has been loaded, connect the USB-A end of the data syncing cable to your PC or laptop. Click the Download box located near the upper-left region of the interface;​
Now, connect the USB-C end of the data sync cable to your tablet. If the vCom drivers are properly installed and configured on your PC or laptop, SP Flash Tool will recognize your device and initiate firmware installation via BROM flash mode. A yellow progress bar located near the bottom of the interface will reflect the percentage of completion. Once completed, you will receive a notification that the procedure was successful.​
Disconnect your tablet and use the power key to boot the device. Your tablet shouid now be restored to its unmodified factory state and running on the latest stock firmware build.​
DOWNLOADS
Installing MediaTek vCom Drivers Guide
7LB1 Android 10 (GE) Factory Firmware
SP Flash Tool v5.1924
THANKS & MENTIONS
I would like to give a heartfelt thanks to Hyundai Technology Support Specialist @yusefgharib for providing me with factory firmware packages for this device, as well as other Hyundai tablet models. Yusef has been a tremendous help in this regard. Also, thanks to @skeleton1911 for his comprehensive guide on installing vCom MediaTek USB drivers on Windows. Great guide with simple and detailed steps.​

Fix HardBrick Redmi 6A (no recovery and no fastboot, only black screen)Fix without need Authotization stuff

-----------------------------------------------------------------------
Finally I could fix my redmi 6A after suffering hardbrick. I couldnot enter to recovery neither to fastboot mode. My redmi 6A just give me a black screen with vibration on each approximataley 15-20 seconds.
----------------
Must have tools:
----------------
1.libusb-win & mtk-bypass:
12.52 MB file on MEGA
mega.nz
2.spflash tool (v5 or the latest on no problem)
SP Flash Tool v5.1924 - Download SmartPhone Flash Tool
SP flash tool download - SP Flash Tool v5.1924 is the latest version that can flash Stock ROM, Custom recovery for your MTK based android phone. SPFLASH tool comes as free-ware.
spflashtool.com
3.mediatek driver:
MediaTek_USB_Drivers.exe | by Droidwin for Misc. Software & Hardware Resources
Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.
androidfilehost.com
4.Install MediaTek USB VCOM Drivers (If required)
5.stock firmware redmi 6A:
Xiaomi Firmware Updater
The ultimate script that provides firmware packages for Xiaomi devices.
xiaomifirmwareupdater.com
or
Download Redmi 6A (cactus) V11.0.9.0.PCBMIXM MIUI 11 Stable Full Rom | XiaomiROM.com
The Stable update V11.0.9.0.PCBMIXM has been officially released for Redmi 6A (codename is cactus). Before updating, please make sure you have …
xiaomirom.com
download and extract, from tgz file u will produce another comppressed file, just extract it once again.
6.auth file
Sp flashtool authentication file!
HIT THE THANKS BUTTON Newer MTK (mediatek) devices usually request for an AUTHENTICATION CERTIFICATE TO FLASH.. here am sharing the file i have.. i have used it on two different phones.. makes me think it can work even on most devices out there...
forum.xda-developers.com
------------------
How to:
------------------
zero step:
----------
dissembler the back case of your phone. Disconnect the battery connector from motherboard. (if you have any difficulty to open the back case, just see it in youtube)
1st step:
-----------
open up spflash tool as Administrator and prepare it beforehand (later on in third step you must quickly switch the app in order to flash the device successfully).
Make sure to fill out the three inputs in download section tab:
-DA (download agent) if it already filled, then just leave it. if not, you must refer it to DA agent files inside your spflash tool folder. You could download seprately DA file from internet.
-fill up scatter file from stock firmware Rom.
Important ! Dont move or change the scatter file position in firmware folder! It must be inside the firmware folder!
-auth file ( point it out to the auth file)
-now just leave this app open, head onto 2nd step below!
2nd step:
------------
run: libusb win32.exe:
Tick on Install a Device Filter and Tap Next
-install libusb
-select install a device filter
-Press Volume Up (or down in another model)
-Insert the USB cable
-Now you can see the device’s COM Port in the LibUSB window, Click Install.
Click OK (tips: quickly click the device when it appeared!).
if u failed, just repeat the 2nd step again!
3rd step:
---------
-Run MTKbypassv4.exe
-Press Volume Up (other device use vol down thoug)
-Insert the USB cable into pc
-press bypass button in app
-make sure all ok/done (green color text)
-now quickly go to spflash app, click download button
eventually spflash will execute flashing the device, wait till it finish (download ok!)!
now try to connect the battery connector and boot it up
Voila, your hardbrick phone has come to life once again!
IMPORTANT!:
here in 3rd step, you would have BROM error (This error clearly means that the Flash Tool has issues finding the COM port on which your device is connected.) if u didnt quick enough to switch to spflash app and click downlod button. If this happen, just resume the 3rd step.

Hi please password to file mtkbypass... Thanks Man

esemokay said:
Hi please password to file mtkbypass... Thanks Man
Click to expand...
Click to collapse
use this:

Tajil said:
use this:
Click to expand...
Click to collapse
use this:

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I have done these steps but it's showing error after flashing in SP flashtool. Please find a solution..

Hariz_mhd said:
View attachment 5878861View attachment 5878863I have done these steps but it's showing error after flashing in SP flashtool. Please find a solution..
Click to expand...
Click to collapse
that error have several indications,
one of them is your emmc nearly damage or have been damage. So, u must change u r emmc.
Try this first:
in your spflash, go to option, in tab general uncheck "storage life cycle check"

After flashing, I'm stuck at mi boot logo. Anyone encounter before?

Pinage said:
After flashing, I'm stuck at mi boot logo. Anyone encounter before?
Click to expand...
Click to collapse
have u tried this version ?
cactus_global_images_V11.0.9.0.PCBMIXM_20200916.0000.00_9.0_global_c0a9fb7059

Pinage said:
After flashing, I'm stuck at mi boot logo. Anyone encounter before?
Click to expand...
Click to collapse
have u tried this version ?
cactus_global_images_V11.0.9.0.PCBMIXM_20200916.0000.00_9.0_global_c0a9fb7059

is this will work on redmi note 7?