[Device Reviews and Information] mihaiolimpiu:
TECLAST X98 3G, Allview Viva/Impera i10G Windows - Final version! Fully tested!

TECLAST X98 3G, Allview Viva/Impera i10G

ATTENTION READ CAREFULLY:

THIS IS NOT THE SAME TABLET as Teclast x98 AIR 3G, don't use any BIOS'es or roms from the AIR, AIR II. It has a different processor! Flashing a wrong bios will brick your tablet!

Manufacturer's page:

http://www.teclast.com/en/zt/x983g/

Technical characteristics:

Screen size: 9.7 inches

Screen type: IPS (Retina Display)

Screen resolution: 2048 * 1536 (4:3)

Processor: Intel Bay Trail 64 Z3735D 1.83 Ghz

Memory: 2 GB DDR3L

Internal memory: 32 GB EMMC

Operating system: Android 4.2

Camera: 2mp front, backside 5mp

Support for WCDMA, Wi-Fi (IEEE 802.11 b/g/n)

GPS navigation + A-GPS

Bluetooth, WIDI

SIM card slot

Micro USB port

3.5 mm headphone jack

memory card support TF CARD 64 GB (tested with SanDisk card)

OTG

Built-in dual speakers and microphone

Battery: 8500mAh

Size: 239.5 mm (d) x 180.5 mm (w) x 8.6 mm (H)

Weight: 602g

Google Drive with all necessary files for Android/Windows conversion! These are not the latest version but will do the job!

Configure your system for correct installation:

Install Intel drivers (From Teclast › Drivers_Tools)

Please install the drivers on your PC in the following order:

iSocUSB-Driver-Setup-1.0.4.exe

IntelAndroidDrvSetup1.5.0.exe

(In the case you are still using Windows XP Please install NetFramework_3.5_full.exe).

How configure software installation:

Install Intel Manufacturing Flash Tool.

I could be necessary to copy a custom CUSTOM_CONFIG.INI file to the program installation folder, please see your manufacturer instructions for updating your tablet. I'm not going to be very specific as I have a Allview Viva I10G, and it could be different....

Go to C:\Program Files\Intel\Manufacturing Flash Tool.

Start Manufacturing Flash Tool.exe

Go to: “File”->“Settings”->“General properties”->“SOC devices”->“VID”-> insert 8087 and into “PID” -> insert 0A65 -> “OK”

Software update: “File”->”Open” select flash.xml file from update folder.

Switch the tablet OFF and while holding the "VOL +" and "VOL-" click "Power". When the tablet stops at the manufacturer logo, connect the tablet to the PC.

DO NOT DISCONNECT THE TABLET WHILE FLASHING!

If it's not working reinstall Android Drivers or check Hardware manager the Android Device that appears in "Flash Mode" has the same VID-PID as instructed above. If they are different, try to use the ones that are used. This is not quite clear, needs more work!

SIMPLEST WAY TO INSTALL WINDOWS from Android/ROOT ANDROID/FLASH BIOS/CONFIGURE WINDOWS USB!

Go to Google Drive with all necessary files for Android/Windows conversion! and download Toolbox.rar. Unrar it to your folder of choice and run it by starting as Administrator 1_Toolbox.bat!

This utility shows you how to enable developer mode, and also checks if the drivers are installed... If not it will install them for you!

Now run in this order, following all instructions:

ToolBOX Teclast x98_3G

a) Download files, which needs for install WINDOWS.

This option downloads a Windows 8.1 ISO for our tablets and places the files in the ToolBox folder.

b) Prepare Windows boot USB-Drive.

Pretty self explanatory, you need a 4GB+ FAT 32 USB disk. It will format the disk and inject the previously downloaded files in the USB drive.

c) Install "update.zip".

Maybe if you have a factory TECLAST ROM you should do it? I don't know what it does?

I never installed it, but I tested on a ALLVIEW VIVA I10G and the process is somewhat different! I've installed the Android files using intel MFT. :(

d) Flash a firmware to Tablet-PC. (FastBOOT)

It should install latest Teclast Android ROM 116, THAT IS NEEDED TO HAVE A FULLY FUNCTIONAL TOUCH in Windows. If you skip this step Windows will work OK, but you won't have a functional touchscreen whatever you do!

If You are already on Teclast 116, you can skip this step!

If it doesn't flash properly the first time you try (like me on a ALLVIEW VIVA I10G) skip this step, install Allview Android rom back into the tablet, install windows without touch support by skipping step c and d, then convert back by flashing a TECLAST ANDROID BIOS and a proper TECLAST android 116 rom, then repeat the process from a to f!

To flash Android/Windows Bios at will use fptw_NEW.zip.

e) Install ROOT and BUSYBOX (Android).

Gain root, required for flashing BIOS!

f) Flash BIOS to Tablet-PC.

This will flash original teclast windows bios to the tablet.

ATTENTION: AFTER SUCCESSFUL BIOS FLASH, HOLD POWER FOR AT LEAST 10 SECONDS TO SHUTDOWN THE TABLET! This will minimize the chances of getting a brick!

Install Windows 8.1 on Tablet

1. connect the USB hub to the Tablet, it connect the keyboard and the bootable USB flash drive you created earlier using TOOLBOX.

2. turn on your Tablet and press Delete several times.

3. In the window that appears, go to category select BIOS Save & Exit

4. In the category Boot Override, select to Boot USB flash drive

Then Save and exit!

5. install Windows 8.1 if everything was done correctly, will start automatically.

6. After the advent of "Operation Successful", immediately unplug the USB flash drive.

7. turn off the Tablet by long pressing Power.

8. turn on the tablet.

Congrats! You have successfully installed Windows 8.1!

After successful installation install every driver from drova.zip manually. Right click on every .inf and select install.

EDIT: After windows 10 November update:

Complete ALLVIEW Impera i10G (Teclast x98 3G) Official windows 10 driver package that fixes touch problems can be obtained here!

After windows install, now what? Quick fixes, driver updates, longer lasting battery...

1. First step will be to upgrade to windows 10, it's newer, works really well, and you will get some updated drivers out of it! Don't forget to insert your license number prior to upgrading so you can take advantage of the free upgrade from Microsoft ;)

2. Install Wi-Fi Fix. Teclast WIFI Optimization tool, I have it installed but I don't really know if it makes a difference. It's for x98 Air 3G. After I've installed it and ONDA 911 my WiFI is 100% stable. It could be the BIOS or this program, I don't know, but it works.

3. Update your bios:

Teclast BIOS11.09.2014 is recommended or latest 911 version (found it at last, all bios-es HERE). Teclast BIOS 28.08.2014 has a touchscreen bug that crashes the touch drivers with 5+ touch points! Onda 911 works sometimes better but you need to sacrifice 3G and GPS, everything else is stable including touch and wireless.

4. BATTERY DRAIN FIX UNDER WINDOWS (thanks to vpx)

The main problem is very old (year 2006) driver of "Intel SD Host Controller", they are 3 in Device manager. Only thing what you need is update driver.

start Computer Management (hold My Computer and select Manage)

select Device management

find SD Controllers, if you click on it, there are 3 "Intel SD Host Controller"s

hold on every one controller, select "Update Driver", select driver from computer, and there is another option "SDA Standard Compliant SD Host Controller", install driver, confirm restart of computer after last update install.

reboot

5. UPDATED WIRELESS AND BLUETOOTH DRIVERS (thanks to Hendrickson)

If you have problems with wireless when using Bluetooth at the same time it was so damn slow, you can use updated Bluetooth and Wireless drivers attached to this post ( Air_3G_Updated_WLAN_and_BT_drivers.zip).

These drivers were discovered November 4th from Dell site and seems to have fixed the issue.

6. FIX Bluetooth only works only in settings page. Disable "Allow the computer to put this device to sleep" in power management page. (24.05.2016, new drivers don't need this fix)

7. Install Comneon Modem driver. Use compatibility mode to install the driver, it's not visible in the METRO interface, but you can use the modem as a dial up modem. I never use it, I know it works. tough...

8. Lower Video card preallocated ram. The tablet has 2 Gb of ram and by default 512 Mb are already allocated to the video card. I use 128/256 for the preallocated video RAM, as the card can still go up to 512 if needed. This setting lets Windows use up to 1.9 Gb ram wich is more than enough for a fluid experience. You can change this is the bios, look for preallocated vram (or something like that).

9. DON'T CHANGE ANYTHING ELSE IN THE BIOS. The settings range from nonworking to doing something totally different. It's better to leave them alone there is nothing too interesting there and messing with the USB settings could make the USB port fail (remember it's the only port, your only recovery if something fails).

10. Disable fast boot and related settings in bios, this removes the Teclast logo on boot to an American Megatrends one (BIOS POST SCREEN) wich is more pleasant to the eye than those Chinese characters! Speedwise, I haven't noticed any difference!

11. Update Kionix Rotation Sensor and Sensor Fusion - 2015 1.28.3. Try to backup your Orientation registry setting first.

12. Delete recovery partition: Only if you installed Windows 10, you can safely delete Windows 8 recovery partition. It's best to use the Disk Manager tool included in windows as it allows you to delete recovery partition and also resize the system partition. You win ~500 mb ? on the system drive by deleting the unused recovery partition. You can't go back to windows 8 if you do this. You can also delete windows 8 backup files (it gets deleted automatically after 30 days?)! Windows 10 recreates this partition at every major update so it's not a good tip!

13. Clean windows WinSxS folder after using WINDOWS UPDATE (thanks to jcespi2005)

Follow these instructions to clean WinSxS folder.

14. Fix touchscreen is sluggish, high system interrupts bug.

BUG IS CAUSED BY A WINDOWS SETTING, Windows 10 Fast Startup. To disable it follow this tutorial! or just run the attached bat file as administrator!

This was tested with the IMPERA drivers!

The driver is not perfectly compatible with our tablets, and sometimes portions of the screen just don't work. To also fixor at least minimize the issue turn off power saving for I2C HID device.

[IMG="I2C HID"]http://xdaforums.com/attachment.php?attachmentid=3605118&stc=1&d=1452424528[/IMG]

Known Problems/bugs

Front camera is very good for skype and communication programs, only the photos have a violet hue. I found out that this is a problem with some camera modules only!

Back Camera is too dark and autofocus doesn't work With the latest drivers and windows 10 1511 camera is fixed!

3G modem can be used only as a ON DEMAND connection as the drivers are for windows 7. Metro interface doesn't recognize the modem at all.

I think this is caused by an incomplete flash procedure, Checked my bios against an Impera Bios and on mine, intel TXE version was missing, but on Impera was version 00.05.00.00 and 01.00.02.1060. You just need to use a flash with complete information, that info can be extracted from first Allview Viva i10G update.

Touch is problematic. ?! With the latest drivers and Disabling Windows fast startup touch is fixed 99%!

This "Tutorial" was compiled in my free time, take it as it is, it worked for me, I've inspired from 4PDA thread and want to thank those guys for their great help, from techtablets and from the x98 Air thread here on XDA (that is pretty similar hardware).

Converting back to android (simple version, don't have time to make a complete tutorial):

Just flash the latest Teclast Android Bios and install latest Teclast Rom. Easy as pie!

NEVER INSTAL ALLVIEW VIVA BIOS if you're converting to Android, it bricks the tablet 100% of the time! On my tablet when converting from Android, I was forced to use only Teclast 116 ROM, as Allview Viva's Rom has the touch Inversed!

Teclast's 116 Rom Works great it has a problem with not working sound after Android Conversion! To fix this, Download the First Allview Viva Rom update, and somewhere in the upgrade files there is a 4.2.bin file... It's a bios file, just flash it and everything will work great!

24.06.2016: Hi guys, this is my last update to this thread, I upgraded to an Teclast X98 Plus 3G.

Try to read the original 4PDA post first, but using the toolbox is pretty easy!