yashsingh1/xdaforums huggingface dataset:
[Teclast X98 Air 3G] robusto:
So I downloaded the lite rom 4.4.4 from the first page, should I now download the partition.tbl for c6j6 and then edit it with the c8j7 values, put it to the lite rom folder replacing the original one of the lite rom? Because I tried to find the values with the noteplus++ but they weren´t there in the original lite partition.tbl..
[Teclast X98 Air 3G] supercowz:
I already gave checksum for dualboot bios, look on my older post you will find it ...
[Teclast X98 Air 3G] mohamad_skiller:
I have same problem

I answer you in private message
[Teclast X98 Air 3G] robusto:
Help me out plz, what rom have you used? I did´t find the values that I´m supposed to change from the lite roms partition.tbl
[Teclast X98 Air 3G] BoORDeL:
Yes general.

I've rooted the phone with FRONTIERS X98 TOOLBOX https://www.oboom.com/MCY35B1Z

Just extract it and run "1_Toolbox.bat".

Than I've intalled link2sd and follow the guide on post 2 to fix google play.

GOOGLE PLAY STORE FIX (thanks to Frontier)

- Download the files from http://d-h.st/nXH

- Copy the .apk files to a folder on your microSD card.

- Go to Settings > Apps and uninstall Google Play Store.

- Install using the supplied .apk's the following (in this order): Google Play Services, Google Play Store and Link2SD.

- Go to Link2SD, find Google Play Store > Actions > Convert into system app.

- When the conversion is complete, reboot the tablet

You should find that Google Play store works now, if you still have issues clear ALL it's data and re-enter your account information.

than I've installed root explorer and fixed mic gain following the guide always posted on second post.

Final version of the microphone gain fix. http://d-h.st/64z

Extract the file and follow the instructions inside the ReadMe.txt

---------- Post added at 16:28 ---------- Previous post was at 16:27 ----------

Yes
[Teclast X98 Air 3G] G3n3R4L:
thanks man, congratulations for the 60hz and dual boot :D u been right from the begining when u said we need bios
[Teclast X98 Air 3G] ISEENOEVIL:
Hi All,

I have the C8J7 model and very keen to flash the BIOS and add dual boot function on this nifty device.

Can someone direct me or give me an idea how i can;

1. Backup stock BIOS

2. Backup ANDROID ROM that came stock with TECLAST (a link where to download the stock BIOS & ROM would do)

I need to have the following before attempting an update of the tablet, at least if something goes nuts and brick my system (hope not!)

Appreciate the input

and KUDOS to supercowz :good: Cheers mate!
[Teclast X98 Air 3G] BoORDeL:
There are heroes here.. i'm not one of them.

I have to thank proud men for their trying till to brick their device to better our experience on this tablet.

Thank you all men.

PS: i've edited last post for an easier understanding.
[Teclast X98 Air 3G] Cozla:
I mean MD5 Checksum with you can create by (for example): MD5 Checksum Tool to bios.bin file. When someone download it and extract can check if that file is not corupted (it will has the same md5 chcecksum when i will generate it for downloaded end extractet bios.bin file)
[Teclast X98 Air 3G] robusto:
OK I have successfully flashed the dual boot bios to my C8J7 and now its on the BIOS.

Can you please tell me what ROM file you have used to install Android again? Can I safely exit the bios now, will it boot back to android if I do so
[Teclast X98 Air 3G] supercowz:
http://xdaforums.com/showpost.php?p=57209840&postcount=1501

yes dualboot ! bios ...

https://www.dropbox.com/s/spj1mn9f0i...20C8J7.7z?dl=0

this one X98Air3GDuala.bin 73E132646B379977ABD70376D895FACE

i flashed on my C6J6 under windows, and on my C8J7 straight from android with ifwi updater ....

---------- Post added at 04:52 PM ---------- Previous post was at 04:49 PM ----------

official rom or ligth rom is ok

yes exit the bios ... dont be scare u are safe with dualboot bios ..

---------- Post added at 04:54 PM ---------- Previous post was at 04:52 PM ----------

????

all happy ... then im happy ...
[Teclast X98 Air 3G] robusto:
OK supercowz, thanks, but I tried to exit the bios and it boots back to bios. Also, if I download the chinese light rom and edit the partition.tbl, I can´t find the values I am supposed to change

in it. Where is the one with the values im supposed to edit
[Teclast X98 Air 3G] supercowz:
on first boot is normal, change boot option and save and exit ..the dualboot will show ...

my first time i was thinking my tablet was in a bootloop ... :p:p

dude com'on value are easy to change ... show us ???
[Teclast X98 Air 3G] ImJamIN:
We have a modded C9J7 bios for C6J6, but on teclast forum, is there original C9J7 to download ?
[Teclast X98 Air 3G] SUMMERBREEZE:
Yes, it is my concern too, i had asked [MENTION=2470600]supercowz[/MENTION] about this. He had 18 gb for windows and 8 gb for android in his dualboot device and the rest about 5.5 gb looks missing.. propably a partitation manager will see what is going on and where is this ghost space etc. :good:
[Teclast X98 Air 3G] supercowz:
for what brick device ? i dont think c9J7 is on the market... only 10units so far ...

original c9j7 will brick device, since the bios have to be modified to boot on other Id, thats the chinese guy say ...
[Teclast X98 Air 3G] robusto:
In the bios, boot option priorities: UEFI OS. That´s the one I should change to disabled, or?

Yeah, I know they are easy to edit but by using notepad++ and ctrl F:ing the value, I didnt find the one I was supposed to change..
[Teclast X98 Air 3G] BoORDeL:
I would like to share sd card between ANDROID and WINDOWS but i'd like that evry os could only see his partition.

I know for sure windows can only use first partition on sdcard while linux could use evry partition.

Using a free tool like mini partition manager it's easy to create multiple partitions (ie: 1st partition ntfs , 2nd ext3)

has anyone tried this trick?
[Teclast X98 Air 3G] SUMMERBREEZE:
which drivers are you advising? a guy who had X98 Air 3G Windows(i think id is C6J7) shared with us his driver backup, you can see it 10-15 pages back. or we should use just the drivers in the first page?

---------- Post added at 05:20 PM ---------- Previous post was at 05:16 PM ----------

17-18 gb for windows and 8 gb for android, what about the rest of space since we have 32 gb eMMC? :laugh: any clue?
[Teclast X98 Air 3G] robusto:
I'm at this point now. It keeps booting back to bios.
[Teclast X98 Air 3G] supercowz:
the 2 last line com'on

last bios page i guess and save &exit
[Teclast X98 Air 3G] SUMMERBREEZE:
yes it does.. it is just a chinese bloatware-FREE rom and some modifications.. but so far better than the original one.
[Teclast X98 Air 3G] majkel_94:
Everything is ok ;) Look at the partition table - 1GB for Android (/system), 1GB for cache (/cache), 8GB for apps and others (/data & emulated sd). On stock ROM you can see that:

And remeber that 32GB means 29.8 GiB. Everythings add to this value ;)

I see that on 4.4.4 ROM the cache partition is 2GB... we should resize it even to 100MB, I have 50 apps (10 bigger games) and 17MB of data in cache...
[Teclast X98 Air 3G] G3n3R4L:
everything is just good, im satisfied with my new dualboot tablet .... i hope would be one thread with everything after

and by the way, vga driver still 0 dedicated memory, i think if we will use the driver we had before for c6j7 everything will be as new
[Teclast X98 Air 3G] SUMMERBREEZE:
I am happy that you will able to use windows and wife will use android in the same device :) For me you are one of the heroes here so far! :good:
[Teclast X98 Air 3G] robusto:
Save & exit doesnt do any good, it still boots back to bios.
[Teclast X98 Air 3G] Estiui:
Do you think it will be possible to put the dual boot on an Air II that comes with Windows? Or is that only for 3G model?
[Teclast X98 Air 3G] SUMMERBREEZE:
i think the original C9J7 will brick our devices cos it is supposed to be flashed into C9J7, but that chinese guy said he modified the bios to use in C6J6 devices. And it suprisingly working in C8J7 too :o
[Teclast X98 Air 3G] BoORDeL:
ahahahahahahh yes mate... this bios has saved my days ;)
[Teclast X98 Air 3G] soudara:
not possible to boot my usb key , i use rufus same the first time im installing windows on it but not starting installation windows 8, i testing usb key on other computer and is working ,what it's your bios configuration same probleme with 2 different usb key , in the old bios is booting perfect , what the problem ?
[Teclast X98 Air 3G] supercowz:
poor ppl who order teclast air II ... the dualbios will not work i guess, beta tester needed

sorry i dont have this model ......higher price with no 3g/gps i was not tempted ...

another info if you like play with joypad ( i play super mario 64.... from n64)

the ps4 dualshock work great (just use ds4tools)

and u good to go on the road ... ??
[Teclast X98 Air 3G] SUMMERBREEZE:
how will we do that :confused:
[Teclast X98 Air 3G] robusto:
I am at the the bios now, didnt do any changes, it just is in the bios and boots again to bios if I put save and exit..
[Teclast X98 Air 3G] SUMMERBREEZE:
this message supposed to be for [MENTION=6197808]Estiui[/MENTION] :D

poor [MENTION=6197808]Estiui[/MENTION] :(

but we had warned you a few times., had not we? :silly:

a higher priced device without DUAL BOOT/GPS/3G :crying::crying::crying:
[Teclast X98 Air 3G] ro11er:
No credit to me for dual boot? Crying
[Teclast X98 Air 3G] supercowz:
edit the partiton table again before flash ....

but be carefull with that if you messtup, u cand loose droidboot ... and brick the emmc ...

i mean you should know what you are doing .....
[Teclast X98 Air 3G] soudara:
supercow peut tu me donner la version de rufus que utilise s'il te plait merci
[Teclast X98 Air 3G] SUMMERBREEZE:
H propably forgot about it :) if you didnt find it in that crappy chinese forum, we would be still dreaming about dual boot and other things to be fixed :D
[MENTION=348215]petruccig[/MENTION] just do it man! :good:
[Teclast X98 Air 3G] majkel_94:
By editing partition table file ;) The same way which we resize the partition to 8GB :P

Only we have to calculate the size and start sectors of each partition.
[Teclast X98 Air 3G] SUMMERBREEZE:
We will need another HERO for this then :D
[Teclast X98 Air 3G] supercowz:
True!!

---------- Post added at 06:08 PM ---------- Previous post was at 06:06 PM ----------

[emoji29] [emoji27]

no more tweak for me for today or tomorrow
[Teclast X98 Air 3G] robusto:
So the last row I should replace with the C8J7 code? There´s a typo in that section, because there is no such line to edit add -b 4948008 etc.. in the C8J7 tutorial

Sorry for dumb questions, just want to avoid brickage..
[Teclast X98 Air 3G] petruccig:
Sorry man,I've corrected this serious forgetfulness. :p
[Teclast X98 Air 3G] Estiui:
Yeah, you're right... :p

The truth is that I ordered Windows and I do not plan to need Android (I already have my cellphone just in case I need it), and I will not be using 3G nor GPS, but I just wanted to know if the method would work in case I wanted to try. If it worked, I'd probably be scared enough not to try it :laugh:

BTW, the Air II was cheaper than 3G, at least where I bought it. The prices even if the chosen version is Windows, but I didn't want to take risk on changing OS, so I ordered Windows directly. And the fact that 3G models with Windows are rarely offered made my final choice for the Air II.
[Teclast X98 Air 3G] Hendrickson:
Not to worry, my Air II at least in my case has an Ipad smooth and responsive touch screen. My bricked Air 3G has a laggy touch screen that is usable and is passable, but in my experience the Air II gets a better touch digitizer. I just wish my Air 3G was as smooth not that it really matters now as its dead.

Edit: Teclast are smart, with this Dual boot feature now it makes it one of the most attractive tablets out there.
[Teclast X98 Air 3G] BoORDeL:
It seems nobody take care of this ??
[Teclast X98 Air 3G] Estiui:
Hopefully I'll be as lucky as you :p
[Teclast X98 Air 3G] supercowz:
i guess air 3G higher sell equal to higher support ... hope im wrong ... for air II owner
[Teclast X98 Air 3G] Hendrickson:
When I fix my Air 3G (If possible) I will try using partition magic and make a ntfs partition and a linux ext3 one.
[Teclast X98 Air 3G] soudara:
just me have probleme to boot from usb key windows8 installation with new bios ?

people install windows can you give me your bios configuration , reset bios by default and just change order boot to my usb key but no start installation

please help me

ty

edit:with old bios i use same rufus version and same iso file no problem directly boot on win 8 installation
[Teclast X98 Air 3G] Grayie10:
Deleting apps

Hi my x98 air 3G has just come today , lots apps and things are in Chinese , is there any thing that I can't or shouldn't delete and can I make it all English also my play store won't load up , any starter points would be very greatful so I don't break it deleting stuff , thanks grayie10
[Teclast X98 Air 3G] robusto:
Got the dual boot menu working, it didn´t function with "save changes and exit" -method, but I turned it off totally and now it shows the boot menu :)

Now I need to flash the android rom, I am a first timer on this, is there a tutorial on upgrading somewhere or could someone help and tell me how to

flash the rom now?
[Teclast X98 Air 3G] BoORDeL:
created bootable usb stick with RUFUS??? have you choose FAT32 GPT?

---------- Post added at 19:12 ---------- Previous post was at 19:10 ----------

CMON robusto u know that all is in the initial posts of this thread ;).
[Teclast X98 Air 3G] TeutonJon78:
Not true for Linux though. If the drivers are there, it would work in either. It's still a step forward to know if it can boot a 64-bit OS.
[Teclast X98 Air 3G] rachidcool77:
all in the 2nd post;

GOOGLE PLAY STORE FIX (thanks to Frontier)

Anyone having issues with Google Play Store - this applies to both Air 3G with the latest 2.0.1 update (will post more information later) and Air II - please apply this fix.

Your OS should be rooted in order for this to work.

- Download the files from here.

- Copy the .apk files to a folder on your microSD card.

- Go to Settings > Apps and uninstall Google Play Store.

- Install using the supplied .apk's the following (in this order): Google Play Services, Google Play Store and Link2SD.

- Go to Link2SD, find Google Play Store > Actions > Convert into system app.

- When the conversion is complete, reboot the tablet.

and you can delet the chines apps by the same Link2sd :good:
[Teclast X98 Air 3G] supercowz:
It seem nobody care too, I did say that already 2 partition on SD card... Fews pages ago...
[Teclast X98 Air 3G] ashkan61:
Dual boot experience and new android ROM

Hi guys

I have C6J6 model with Chinese lite ROM and I flashed dual boot bios inside android and everything is simply OK!

I'm very happy for this purchase and I think this tablet is a real catch! specially regards to its price tag.

By the way, I found these ROMs for C6J6 and C8J7 in the Teclast forum:

bbs.teclast[dot]com[slash]thread-259081-1-1[dot]html

Description:

1, this line is based on the Taiwan Power X98 Air 3G (C6J6), (C8J7), streamlined into Android 4.44 firmware! Hardcore streamlined, smooth smooth!

2, simplifying many common software and driver is not valid! Added a small amount in the software!

3, use cracked millet in the purchase, you can freely download premium theme!

4, adjust the build.prop parameters to adjust the smoothness and optimum touch!

5, forcing the GPU rendering, improved image quality and video quality!

6, optimizing WiFi Internet speed, adjust the WiFi scanning interval is 180 seconds!

7, optimized GPS Star Search, adjust the default server for mainland China. Using GPS positioning Search Assistant test without WiFi and 3G network, star search more than 10 seconds to complete!

8, this line is not root, oil with their own root master PC version root!

9, the lines brushes Pack for ID for C6J6, C8J7 X98 Air 3G machine. Other ID of the machine without testing if brushed one of the camera upside down problem occurs, please try to download another Flash!

C6J6:

pan[dot]baidu[dot]com[slash]s[slash]1mgMHai8

C8J7:

pan[dot]baidu[dot]com[slash]s[slash]1i31ixRf

I couldnt download that because of internet speed problem. Could anyone download and test it as well as upload it in another server?

Regards
[Teclast X98 Air 3G] HDtracer:
Thanks for supercowz

Come on guys use the thanks button for [MENTION=2470600]supercowz[/MENTION]

He has just saved you guys who want dual boot over $200usd in not having to buy the Ramos tablet, didnt sleep for what seems like a day, risked bricking his tablet, fixed lots of problems and cant even get 6 thanks............:crying:
[Teclast X98 Air 3G] Informatic:
Hey guys, and thanks for all the research!

I've successfuly reflashed Dualboot BIOS onto my C8J7 device i picked up today.

I'll update this post with my findings.

Flashing from stock ROM

So far i found that device reboots to SETUP screen after flashing using UpdateIFWI (which was included in 4.4.4 Android ROM i received my tablet with, no modifications so far) and "Save and continue booting" kept it returning to setup screen.

Selecting "Save and reset" caused it to power off and then, after powering it up again i was welcomed by OS selection screen (which showed Android only, which is correct)

I selected Android, pressed selection button (the one with chinese label), my device hanged on some bootscreen, and after some 2 minutes it entered DnX mode.

fastboot reboot` nor `fastboot continue` did work, so I long-pressed power button for some 10 seconds, device powered off, then I powered it on, got the boot selection again, selected android, and booted just fine, system is back, not a single app missing. Yay!

Now I'm going to try resizing /data partition with some systemrescuecd or whatever, as suggested in Dualbootwindowsinstallmethod.zip...

Note about Android poweroff: Okay, poweroff on Android... doesn't really poweroff. (at least when there is no Windows installed yet) Seems like the devices stays in some kind of infinite loop, and needs to be forcibly powered off by keeping power button for 10 seconds. Then I can just power it on with power button... Seems a little bit strange, but I think I can deal with it... :)

Note about setup and booting from USB drive: I tried running some old SystemRescueCD image I had burned on a random pendrive I found. To do so I had to open Setup menu again (ESC - which didn't work first, because of incompatible keyboard, keep that in mind!) and do Exit → Override boot: UEFI Pendrive [or something like that]. It did boot in x64 mode, but sadly didn't manage to get a shell since it doesn't recognize a USB hub and thus can't find the rootfs - https:// i.imgur.com/vDsjRcE.jpg (it may be caused by some shortcomings in XHCI/OHCI drivers, i don't know, i will research on that further, when i start playing with Ubuntu/Sailfish or such. It's highly possible it would work with some newer image/kernel, will check that tomorrow)
[Teclast X98 Air 3G] USDan:
I can't figure out why my ROM flash is failing. I'm on a C8J7, and have tried this with 4.4.4 Lite and normal (from the Teclast website) - I'd really appreciate someone to look over what I'm doing and tell me if it's incorrect or if it worked for them.

Here's what MFT is showing:

[IMG="MFT flash failed"]http://i.imgur.com/gO5IYA9.jpg[/IMG]

Here's the display on the tablet:

[IMG="Tablet error"]http://i.imgur.com/BwZLmkC.jpg[/IMG]

Here's the partition.tbl contents, edited with Notepad++ (I've also previously tried Edit++, same result):

partition_table=gpt
create -z /dev/block/mmcblk0
create /dev/block/mmcblk0
boot -p /dev/block/mmcblk0
reload /dev/block/mmcblk0
add -b 40 -s 131072 -t efi -u C12A7328-F81F-11D2-BA4B-00A0C93EC93B -l ESP -T 0 -P 0 /dev/block/mmcblk0
add -b 131112 -s 131072 -t data -u 80868086-8086-8086-8086-FFFFFFFFFFF0 -l reserved -T 0 -P 0 /dev/block/mmcblk0
add -b 262184 -s 32768 -t data -u 80868086-8086-8086-8086-000000000100 -l boot -T 3 -P 15 /dev/block/mmcblk0
add -b 294952 -s 32768 -t data -u 80868086-8086-8086-8086-000000000101 -l recovery -T 3 -P 14 /dev/block/mmcblk0
add -b 327720 -s 32768 -t data -u 80868086-8086-8086-8086-000000000102 -l fastboot -T 3 -P 13 /dev/block/mmcblk0
add -b 360488 -s 32768 -t data -u 80868086-8086-8086-8086-FFFFFFFFFFF1 -l reserved_1 -T 3 -P 0 /dev/block/mmcblk0
add -b 393256 -s 131072 -t data -u 80868086-8086-8086-8086-000000000104 -l test -T 3 -P 12 /dev/block/mmcblk0
add -b 524328 -s 65536 -t data -u 80868086-8086-8086-8086-000000000001 -l panic -T 0 -P 0 /dev/block/mmcblk0
add -b 589864 -s 32768 -t data -u 80868086-8086-8086-8086-000000000002 -l factory -T 0 -P 0 /dev/block/mmcblk0
add -b 622632 -s 32768 -t data -u 80868086-8086-8086-8086-000000000003 -l misc -T 0 -P 0 /dev/block/mmcblk0
add -b 655400 -s 32768 -t data -u 80868086-8086-8086-8086-000000000004 -l config -T 0 -P 0 /dev/block/mmcblk0
add -b 688168 -s 2097152 -t data -u 80868086-8086-8086-8086-000000000005 -l cache -T 0 -P 0 /dev/block/mmcblk0
add -b 2785320 -s 524288 -t data -u 80868086-8086-8086-8086-000000000006 -l logs -T 0 -P 0 /dev/block/mmcblk0
add -b 3309608 -s 2621440 -t data -u 80868086-8086-8086-8086-000000000007 -l system -T 0 -P 0 /dev/block/mmcblk0
add -b 4948008 -s 16384000 -t data -u 80868086-8086-8086-8086-000000000008 -l data -T 0 -P 0 /dev/block/mmcblk0
reload /dev/block/mmcblk0
[Teclast X98 Air 3G] jcespi2005:
Wasted my 8 thanks for today, but will have some of the tomorrow ones ;) for sure
[Teclast X98 Air 3G] supercowz:
On C6j6 I guess ... C8j7 less trouble I guess, for me now C8J7 seem better ... Need to dig a bit more ...
[Teclast X98 Air 3G] G3n3R4L:
can you check your vga dedicated memory ? is it 0 ?
[Teclast X98 Air 3G] alwinpietersen:
I read that Android is running less smooth on this tablet compared to Windows.

Is this also the case for the Android 4.4.4 firmware?
[Teclast X98 Air 3G] seba2000:
Hi guys,

Could you please quickly explain me (us) main differences between c6j6, c8j7, etc. which you mentioned? (I saw also hg5n, hg6n...)

Which one is better to buy, how to recognize them?

When I am looking into Internet offers then I don't see those versions as options to buy.

Thanks in advance for your reply!

BTW, X98 air 3g dual boot versions came up on Aliexpress...
[Teclast X98 Air 3G] soudara:
it's ok but i need to reflash bios with ifwit on android for boot on windows usb key installation , i think my bios are little corrupted after multiple change , now is working perfect with boot menu , i installed on free 18,5 gb space available in windows installation setup

thank you all
[Teclast X98 Air 3G] supercowz:
Order c8j7 x98 air 3G android here, no need to pay for dualboot, or win verison u can make it yourself, I'm sure they will raise the price soon ... U will see :)

C8J7 seem the best hardware now ... Less hardware bugs for me ...

tell them "echo I'm friend of Mr viey from France, small discount please... Hello from XDA"

They are officially teclast reseller, and they know me ...

If you live in Europe ask for NL shipping, way faster than CN post ... CN post up to 2 month now

But with NL around 10 days to France ...

http://www.aliexpress.com/item/9-7-...Core-Tablet-PC-1-83GHz-Retina/1862203196.html
[Teclast X98 Air 3G] seba2000:
It's nice that we can always count for community support;)

I know that this is dumb question, but seriously, could you point differences and how to recognize particular versions?

How do you know that this is c8j7? (and not c6j6 for example)

Thanks!
[Teclast X98 Air 3G] majkel_94:
Partition size

Guys, could you make a screenshot of partition size & usage in 4.4.4 ROM?

I'm on 4.4.2 and it looks like Teclast increased the system and cache size from 1GB to 2GB... we should do something with this to unlock more size for Windows Partition ;)
[Teclast X98 Air 3G] SUMMERBREEZE:
my THANKS limit finished today, he needs to wait till tomoz :D
[Teclast X98 Air 3G] micky1067:
Hello....

I startet to flash the BIOS. How long I need to wait till the flashing is ready ? Now it runs 15 minutes or more.

Can I stop the flashing about a special time ? And how I can flash it from windows with usb when it dont start ?

I am afraid to brick it.

Thanks for the reply.

micky1067