yashsingh1/xdaforums huggingface dataset:
[Teclast X98 Air 3G] richy91:
launcher deleted! :(

I can not do anything on Android but Windows works.

How do I get it back? I need to install new Android?

I have the Teclast X98 Air 3G C9J8.

Where can I find the Custom Config?

What do I need for C9J8 Rom?

MFG tools will do nothing if I want to flash
[Teclast X98 Air 3G] Okluzhion:
900 pages and we still don't have a separate subforum here. If that's not sad and frustrating, I don't know what is.

Sent from my eXposed C6603
[Teclast X98 Air 3G] royeiror:
That's why I created /r/teclast so things can be a bit more organized.
[Teclast X98 Air 3G] Graf Schmidt:
?

No. I mean how can I boot up USB stick with windows 8.1 again via OTG since I've already installed OS.

Is there any way like having a keyboard plugged in into USB hub?
[Teclast X98 Air 3G] dzikk:
will be work my tablet when i upgrade graphic driver to the newest in windows?
[Teclast X98 Air 3G] daWyrd1:
launcher deleted!:(

you deleted the stock launcher and you didn't have another one installed? you don't need a launcher to flash with imt, though. just boot into fastboot (press volume rocker down along with power button when booting after you get imt ready on your pc) you could use the originsl 4.4.4 1.00 rom from teclast or mirek's v3.1 kitkat. you can find links to those at the beginning of this thread. the 4.4.4 2.0 rom on techtablets also works fine on the c9j8.

is this what you are asking or have i totally misinterpreted your question?

good luck richy91
[Teclast X98 Air 3G] vpx:
Thank you for clarification. Do you know, how big risk of frying chip is programming eeprom through CH341A with USB 5V?

I read here, that some people were successfully programmed BIOS with CH341A
[Teclast X98 Air 3G] Muxa52:
if you flash the BIOS in the Board, the risk is low. most importantly, connect the clip correctly.

if you desolder the ROM and flash it in the programmer, then the risk is almost 100%
[Teclast X98 Air 3G] mirek190:
Do you have any temporary Cwm ?

I was trying to build working Cwm a few months ago but was restarting device after 30 sec without any reason.

I try build again in few days - maybe a source on github was updated ...

---------- Post added at 11:08 PM ---------- Previous post was at 11:07 PM ----------

Tommorow I try in the evening .
[Teclast X98 Air 3G] kostas-k:
I have successfully flashed two tablets using this CH341A programmer, no problem with volts.

"Στάλθηκε από το Sony Xperia Z1 Compact"
[Teclast X98 Air 3G] so_ang:
OTW to Try Mirek Rom
[Teclast X98 Air 3G] severall:
But which model/revision ? From what i've read some models have Winbond 25Q64FV - 3,3V and some (mine C6J6) have 25Q64FW - 1,8V.

Flashing 25Q64FW using CH341A whick operate at 3,3V could be a little risky and might fry the chip. But i found on some forum that one guy was succesfull. Today i will have ch341a and a test clip so i will be guinea pig and will give it a shot ;)
[Teclast X98 Air 3G] deathrowz_sri:
Can someone post me a link to 4.4.4.ROM official or custom ROM for C5J6? Having bit of a difficulty in flashing official Teclast rom as it gives me this error Port 0/1/3 #0: Device on port 0/1/3 #0 timeout to enum adb (TIMEOUT = 180). Anyone know the reason?
[Teclast X98 Air 3G] mirek190:
I lost my orginal c8j7 and c9j7 roms

Anyone saw official roms for c8j7 and c9j7 I need them to build my customs .

At the moment I have orginal roms for c5j6 and c6j6 only.
[Teclast X98 Air 3G] kostas-k:
I really don't remember because I used the "Detect" button to search the chip version, but I think I have the Winbond 25Q64FV one
[Teclast X98 Air 3G] ar2rc:
plis... me too, the front is not working. c9j8
[Teclast X98 Air 3G] dzikk:
http://xdaforums.com/android/development/intel-android-devices-root-temp-cwm-t2975096

I didn't check this because i have exams....

btw. Mirek if you can please share rom to C5j6

Wysłano z podziemi Mars City za pomocą osobistego PDA
[Teclast X98 Air 3G] severall:
Do you have C6J6 or different revision ?
[Teclast X98 Air 3G] chrissss91:
Hi Mirek190, did you received your tablet ? Which model did you choose ? C5J6 ?
[Teclast X98 Air 3G] mirek190:
Yes I got yesterday [emoji1] .

I have 64 gb - c5j6 .

---------- Post added at 10:48 AM ---------- Previous post was at 10:45 AM ----------

I made a dump of my orginal rom from C5J6 and can share - no problem .

Dump is only rooted.
[Teclast X98 Air 3G] chrissss91:
:good:

Can I ask where did you buy it ? I would like to have a C5J6 but version is not indicated on websites :/
[Teclast X98 Air 3G] mirek190:
I've bought it from here

Not the cheapest ....but c5j6 at least .

http://www.aliexpress.com/snapshot/6702291589.html?orderId=67598132233755
[Teclast X98 Air 3G] ippocampos:
Hi mireck i also have the same C5J6 please can you give us the stages or a guide we have to follow untill the final stage of change the bios?? (sorry im a rookie)

Im talking about back up...android and windows...rooting ......... e.t.c.

P.s which bios you have ??? i cant see it with del key pressed during boot up..

Thanks!!!!
[Teclast X98 Air 3G] mirek190:
I have 1.07 bios now.

Today I'm changing to 2.02 .

About change bios - the safest way is in android but I changing via pc in android ( 10 times so far ) .

- On PC - installed adb .

- unpack flasher on drive c:\

- go to task menager and check that adb is killed .

- run flash.bat ( not as administrator )

- plug tablet via usb

- run flashing ( read everything what appears ) it takes around 2 minutes

- it should end with - finished or so

- wait 1 min and keep power button until swith off tablet itself .

Swith on and that's it. ..
[Teclast X98 Air 3G] Graf Schmidt:
Found a solution

BOOTING USB STICK WITH WIN8.1 ON IT

If you need as I did to boot again from an usb stick on a dual boot x98, all you need to do is plug in the OTG with USB HUB in which you'll plug in external keyboard (in order to hit ESC on device boot and enter the BIOS) and the usb drive.

Remember to select Windows force boot in menu (the device must not be booting android as default) otherwise if you try to boot the USB stick, display will just blink doing nothing apparently.

You can boot any time from USB stick and format Windows partition (or the whole internal SSD) and install/reinstall Windows.
[Teclast X98 Air 3G] deathrowz_sri:
I would like have a system dump. Thanks!
[Teclast X98 Air 3G] BoORDeL:
Hi mirek,

i have done a diff between boot and system img in your rom and the lolipop beta for AIR II from TECLAST FORUM.

Customization apart, there are NO DIFFERENCES in library, kernel modules and drivers (few drivers seem newer in teclast one).

So it seems your rom can be used by AIR II model too.

TECLAST THREAD: http://bbs.teclast.com/thread-397112-1-1.html

FASTER REPOSITORY FOR ROM DOWNLOAD: https://mega.co.nz/#F!s9Zh1azA!8TEmGTKZ9Ahn3FgWis_Iug (tnx to ROYEIROR)
[Teclast X98 Air 3G] artyums:
Hello all.

I'm have a trouble with this tablet (C9J8)...

Touch screen doesn't work anywhere - in Windows, Android, DUALBOOT screen - anywhere! When I turn on the tablet, this text appears on the screen : "[I2C HID] GetI2CDeviceData failure ...".

This trouble started after Windows 8.1 restore process (via standart Windows tool). Tablet worked properly for a several reboots, but after one of its - this trouble appeared..

(tried method of reflashing boot.img, it doesn't help me... and, my case is a bit another)
[Teclast X98 Air 3G] kostas-k:
I have a C8J7 and a C9J6 which where flashed to 2.02 BIOS successfully using CH341A
[Teclast X98 Air 3G] Araneo:
How I can backup my original bios?

How I can inject win serial number from original bios to new bios?
[Teclast X98 Air 3G] severall:
Thank you. I just flashed my C6J6.. all looks good , verify run ok but the tablet is still dead...and i try diferrent BIOS.
[Teclast X98 Air 3G] royeiror:
Just be advised I'm using a free MEGA account and am capped to 10GB of data transfer a month, so a mirror would be a good idea.
[Teclast X98 Air 3G] Vinxent666:
idem

idem . same situation . What bios is it? you have to upgrade to 2.2 ? or 'already ' it updated ?
[Teclast X98 Air 3G] deathrowz_sri:
[MENTION=2198172]mirek190[/MENTION] Apparently navigation bar misalignment is only there in v3. I flashed v2 and its almost ok with 1mm difference. Im on C5J6 and would it be possible to look why this is caused before your next release? Much appreciated!
[Teclast X98 Air 3G] Vinxent666:
improvements that make this bios?

---------- Post added at 03:58 PM ---------- Previous post was at 03:54 PM ----------

CPU-Z shows my BIOS to version 5.6.5 I model C5J6. Teclast Model: Tpad BIOS: American Megatrends Version: 5.6.5 Date: 16.01.2015.

I can not understand if already 'there' mounted above the 2.02 or you must update it.

What bios is it?
[Teclast X98 Air 3G] dzikk:
[MENTION=2198172]mirek190[/MENTION]

do you make dump via CWM ? because i want to make dump also my android
[Teclast X98 Air 3G] vpx:
It does not sound well :(

Good luck with other BIOS
[Teclast X98 Air 3G] mirek190:
Stock android 4.4 ( C5J6 ) - only rooted

https://drive.google.com/open?id=0B8BF9-TGlz-FSGU0WFVHckpWM0E&authuser=0

https://mega.co.nz/#!98BD1aKD!JASTHv30QsYjYd6Pu-lIYviu_blBmeb8yUlzLNq0pbc

And also on my Google drive from the bootom of my posts.

---------- Post added at 05:56 PM ---------- Previous post was at 05:54 PM ----------

I make backup via dd command in adb.
[Teclast X98 Air 3G] xxLeoxx93:
Does the tablet need to run android for that or is the old dualboot bios enought?
[Teclast X98 Air 3G] mirek190:
That new bios repairs only sleep mode in windows.
[Teclast X98 Air 3G] xxLeoxx93:
I currently use the dualboot bios, but only with windows. So I want to update to the new bios without flashing android first. Is there a way to do so or do I have to install android first to flash the new bios?
[Teclast X98 Air 3G] severall:
I flashed all kind of BIOS i found over internet. Still no results. Flashing is good... i compare MD5 checksum of source file and the file read from chip .. it's the same. But the tablet is very very dead.. not even charging. Maybe something else is broken.. i don't know. It's strange because it happened when i flashed BIOS through Windows. After restart tablet it was dead.
[Teclast X98 Air 3G] Wootever:
[MENTION=4430020]severall[/MENTION]

Check with a voltmeter if the battery supply at least 3.5V, if connected to a charger the output on the battery connector should be around ~4V.
[Teclast X98 Air 3G] mirek190:
If you change bios everything will remain untouched .
[Teclast X98 Air 3G] severall:
On the battery is 3,15V and on the BIOS chip is 1,8V. I think it's good.

If i connected charger battery output has 3,3V and slowly increasing.
[Teclast X98 Air 3G] totor54:
the archive is corrupted or its format is unknown

Download several times
[Teclast X98 Air 3G] Jacklya:
I do not like the window 8.1 because it's harder to use.:o
[Teclast X98 Air 3G] ippocampos:
I have the same bro....probably we are at 1.07
[Teclast X98 Air 3G] Wootever:
3.15V is quite low, the battery protection circuit should intercept at around ~3.3V, i guess that could be reason why the tablet isn't starting anymore.
[Teclast X98 Air 3G] loubkt:
Hi mirek ans thank's for your job...

I have a question: i have a x98 air 2 /32go/hg7n/ dual boot i have your 5.0 ROM installed it works nice!!!

But i would like to update my BIOS from Android directly how can i do this?
[Teclast X98 Air 3G] dzikk:
Could someone confirm that this tablet charges battery to 4.3V? or it's only issue of programs
[Teclast X98 Air 3G] Wootever:
[MENTION=1221092]dzikk[/MENTION]

The windows voltage indicator isn't completely accurate, however the battery voltage range indeed is between ~3.3V and ~4.3V.
[Teclast X98 Air 3G] dzikk:
but max voltage of li-poly battery is 4.2V, overvoltage can explode battery, so i wanted to know ;) i must open my tablet and check this ;) thanks for answer
[Teclast X98 Air 3G] Wootever:
[MENTION=1221092]dzikk[/MENTION]

This is something i wondered about too, either they use newer Lithium-Ion / Lithium-Polymer technology which is rated at 4.3V or they use a generic charging setup which isn't actually designed for these batteries - which mean they rely on the battery protection circuit.

Doesn't seem that uncommon as the Onda V975W had also some problems with the battery.
[Teclast X98 Air 3G] mirek190:
RAR 5.0
[Teclast X98 Air 3G] jcinfo:
Hello y have c9j7 dual 32gb, Windows 8.1 and mirek190 rom 4.4 V3, can y upgrade bios "V1.03" to V2 for android 5 ? ok just y update android and dont touch my bios ?

Thank
[Teclast X98 Air 3G] xxLeoxx93:
I know, but HOW can I flash the bios WITHOUT android?
[Teclast X98 Air 3G] Wootever:
[MENTION=5191331]xxLeoxx93[/MENTION]

You can also use fptw (Intel Flash Programming Tool for Windows) to update the bios.

The update process operates perfectly fine on my device, i'm not sure what causes the problem that the flash process can result into bricking.

Anyway, you need to open a command shell with administrator privileges and perform these commands.

This will create a backup of your current bios:

fptw -d backup.bin

This will update the bios:

fptw -f X98_Air_3G_Dual.bin
[Teclast X98 Air 3G] djmvt:
ok some people asked about the camera drivers on win 8.1 since it seems my camera is working (at least in windows both cameras are working, android has an autofocus issue)

I found a way in win powershell to backup all thirdparty drivers so here is the one for the camera. this is from an unmodified windows 8.1 partition on my own teclast x98 c8j6 tablet. hope you can use this.

http://www.files.com/set/5581ea427d06a
[Teclast X98 Air 3G] c0manche:
Thanks for that but also need the Driver files for Camera Sensor OV2680 thats listed in the System Device section of the device manager as thats the actual coresponding camera driver we need to get our front camera working with the new firmware

Thanks
[Teclast X98 Air 3G] sikke1:
Yes. Look the date. You have dualboot bios from January. CPU-Z catch wrong bios version parameter. New bios is 04/21/2015

New bios will decrease sleep battery consumption

This is 2.02
[Teclast X98 Air 3G] royeiror:
I made a Windows dump for my HG9M Here. It might work for you.
[Teclast X98 Air 3G] Mattycee:
Does your survive a reboot at all? Everytime I change the DPI it centers the notification shade, but when I reboot the shade is back over to the left again. The DPI is still the same, but the notification shade is over the left hand side again.
[Teclast X98 Air 3G] dennemann:
Yes it seems it only works until reboot. You have to change dpi again to center it. This is a bug in v3 that probably will be fixed.
[Teclast X98 Air 3G] anchal joshi:
Cool

This thing is just okay.
[Teclast X98 Air 3G] djmvt:
as per request here are the extracted camera drivers ov2680 and ov5648 (not sure if this is also a camera driver)

no warranty if this will work ;)

http://www.files.com/set/55824e8dcf235
[Teclast X98 Air 3G] oam_xda:
You now flashed it with CH341A? Can you describe the process again here and maybe even show pics? And the clip works OK? Maybe the battery is too low?

---------- Post added at 05:13 AM ---------- Previous post was at 05:07 AM ----------

Nevermind, I now noticed your later posts... Sorry to hear that you had such a bad luck with the flashing!

Maybe order a new chip and replace it in the board (hard to solder yes)? Or try find a screen broken spare tablet and take the whole board?
[Teclast X98 Air 3G] ippocampos:
Sorry i cant understand....you think that we have 2.02...??

But did you check windows sleep situation??.....because i have battery drain so this is why i assume that we have 1.07...
[Teclast X98 Air 3G] mirek190:
I need any orginal rom for C9Jx version witchout I won't be able build 100 % working rom on that revision of the tablet .
[Teclast X98 Air 3G] majkel_94:
Thanks, this driver match to OV2680 but now it show error code 10 - "STATUS_DEVICE_POWER_FAILURE". So still not working, looks like they changed sth in BIOS and now we need new driver.

Someone looked for it on chineese forum? :P
[Teclast X98 Air 3G] DANGERBANANAS:
I have C9J6, 64 GB, dual boot, what bios i can use???

I try to flash in android, and do not nothing :(
[Teclast X98 Air 3G] Robo11111:
You have to flash it in orig. android rom.

Sent from Nexus 5 with Tapatalk
[Teclast X98 Air 3G] kkoops:
mirek190 wrote in post #9025 how update BIOS without flashing Android. I did it the same way and it worked perfectly.

Don't forget to extract (before) and reinject (after flashing the BIOS) your windows license key with the Taipower BIOS Utility (has to be executed in Windows on the device itself).
[Teclast X98 Air 3G] djmvt:
Wich version x98 do you have?

This driver comes from stock windows 8.1 on c8j6 with new bios 2.0.2 so I am wondering why it isn't working for you.

Could it be that another driver (logic bus driver or something like that) isn't working and the result is that the camera is not starting? Just trying to help you ;)
[Teclast X98 Air 3G] dzikk:
i forgot to make backup of my licence key but i have backup of bios and i wrote my key on paper. How can i get licence key and inject it back to bios?
[Teclast X98 Air 3G] majkel_94:
C6J6, after update BIOS to 2.02 the front camera is not working. On Android everything is ok ;)
[Teclast X98 Air 3G] giupa87:
Hi

i just installed the mirek`s rom v 3.1 all variant on my air II (HG6M) but the camera doesn t work. Is there any fix to solved this problem?
[Teclast X98 Air 3G] royeiror:
Mirek could really use your ROM dump for his ROM release if you could help with that.
[Teclast X98 Air 3G] Vinxent666:
Cry...
[Teclast X98 Air 3G] dzikk:
Can i downgrade bios with backup which i made by X80H_Toolbox_V4 ?
[Teclast X98 Air 3G] mirek190:
NO !

Backup bios is not ready to flash - you brick device !

It must be modified .

---------- Post added at 07:15 PM ---------- Previous post was at 07:11 PM ----------

Could dump a system for me - I need system from C9Jx device .

Just in terminal ( android ) use this commands

dd if=/dev/block/mmcblk0p3 of=/storage/sdcard0/boot

dd if=/dev/block/mmcblk0p14 of=/storage/sdcard0/system
[Teclast X98 Air 3G] dzikk:
is it possible to make windows key.bin with my key? or put my key into 2.02 bios?
[Teclast X98 Air 3G] astromark:
Please don't shoot me down, but for those of us who have got a new device in the past couple of weeks: a couple of basic questions which I haven't satisfied myself with 100%.

There have been lots of questions in the past couple of days, so here are some more :D but hopefully these being answered in one place will help out all device newcomers.

1. Is the latest BIOS version 2.02? And this mainly fixes power consumption in Windows? (Mine has gone from fully charged to 15% charge today with very little actual use.)

2. Does 2.02 work on ALL versions of the X98, including the new C5J6 64GB dual boot version? We're seeing BIOS version 5.6.5, but that really means 1.07?

3. Is the safest way to flash using Mirek's method:

http://xdaforums.com/showpost.php?p=61394221&postcount=9025

4. or is this way better as described by Wootever - and is this way done in Windows on the device itself?

http://xdaforums.com/showpost.php?p=61404162&postcount=9059

5. And the Windows license key needs to be extracted beforehand and injected back in after a BIOS flash?

http://xdaforums.com/showpost.php?p=61413369&postcount=9074

6. Anything else we should know to help prevent bricking and having to flash BIOSes with programmers?

Thanks all.
[Teclast X98 Air 3G] xxLeoxx93:
I just tried that, finished with "PIN Operation passed", I hit restart, but no boot up. So either the flash was bad or the 2.02 Bios doesn't work on the HG6M Version
[Teclast X98 Air 3G] loubkt:
Problem with asphalt 8

Hi everyone, i have the mireks ROM v.3.0 installed on my x98 air 2 everything works fine except asphalt 8 .... I play one and a half race ans all is freezing i have to reboot the tablets .... Anyone have the same problems ?

And if so...a solution?

Thank's!
[Teclast X98 Air 3G] articsilverfox:
About to pull the trigger on my first buy of the Teclast X98 Air 3G Tablet, going to get a 64gb dual boot model.

I figured no one would have better experience with these then you guys. Its going to be an upgrade from my iPad3 64gb which is really starting to struggle with web browsing etc.

I don't game on my tablet, I noticed the guy on techtablets liked windows 81 on it over android, I figured because he liked to play games? Has the Android experience improved at all on this tablet? I am a heavy chrome browser user so it would be nice to use chrome in its native OS.

The main fear I have is that the guy from Tech tablet said that he can't use his outside at all just cant view/see the screen... since using my iPad I can't imagine a tablet not being able to be used outside at all is this true?

Any thoughts in general for a new buyer looking at this tablet would be appreciated.

Cheers.
[Teclast X98 Air 3G] Wootever:
I'm sorry to hear that, it may also be possible that upgrading from a much older version results into a checksum mismatch, which prevents the bios from booting.

This would be the case if someone with a bricked Air II successfully restored their tablet with a clean flash of the Air 3G bios version.

Here are the most recent bios versions i could find:

Teclast X98 Air II [21.04.2015 15:46 tPAD201] (02.01)

Teclast X98 Air 3G [21.04.2015 17:48 tPAD202] (02.02)

It doesn't make sense to switch device compatibility between such small revision updates.

I need to make a test if my Air 3G is compatible with the "Air II" bios.

---------- Post added at 11:23 PM ---------- Previous post was at 10:55 PM ----------

Yes, but (for now) only the Air 3G is confirmed as working.

I made a successful update on revision C5J5, C5J6 should be compatible as well.

5.6.5 represents probably the AMI toolkit revision number, which has no correlation with the Teclast revision scheme (2.02).

For me personally, (as windows only user) is the flash procedure on the device in windows more comfortable.

About the process itself, there is no difference as it is always FPT (Intel Flash Programming Tool) doing the flash.

Only if the bios chip is completely erased beforehand, we`re mostly doing only an upgrade.

It is however always recommended to create a backup of the current bios (the windows serial can be extracted from this dump later).

This whole bios update process seems pretty peculiar (at least on this device).

If you can't afford to lose/brick this tablet or you don't want to buy/handle with the corresponding spi programmers if the flash process fails, then you should stand back from these bios modifications - exceptions are devices that are confirmed working like the C5J5.
[Teclast X98 Air 3G] astromark:
Thank you. Mine's the Air 3G and I've only had it a few days. As it's as C5J6, I might wait until somebody else reports that they have flashed to 2.02 before trying it. Anyone who's had success please tell, and with which method.

It's not so much the money if I break it - it's waiting 10 days to get a new one! Equally I don't want to have to buy a programmer which I will most likely use once only. If it wasn't for those things I'd give it a go tonight.

I do want to try 2.02 because battery life on standby is ghastly. 80% down today in 8 hours without doing anything. And mid-afternoon I turned the wifi off and it still lost 5-10% an hour. I wistfully remember my I got first tablet (Xoom, still going strong!) and was amazed when I'd put it down and forgot about it - a few days later it was still checking emails itself etc, and battery was still strong. This Teclast (and to be fair, my other Win 8.1 tablet, so I assume it's a Windows thing) are terrible at standby. I hope Windows 10 fixes it, but I suspect it's more of a hardware architecture issue. So I don't expect an improvement beyond what the BIOS upgrade can offer me.

I have done the make-a-desktop-hibernate-shortcut thing but really, who wants to think about that on a tablet?
[Teclast X98 Air 3G] SkOrPn:
These devices can hibernate? Really?