Over at IMP3Net [Google Translate].
By combining two OSes into one tablet, the tablet is essentially split into halves. That decreases internal storage for each side. Teclast compounds that by including even more pre-installed apps on the Android side:
The Android side of internal storage:
The Windows 8.1 side of internal storage:
There’s no communication between the two sides. They can’t see each other’s files nor can anything be copy/pasted from one side to the other.
As for 3G, voice call use is possible only on the Android side. The Windows 8.1 side is limited to 3G data.
Previously here:
More About The Teclast Dual-Boot X98 Tablets
Teclast Makes Windows 8.1/Android Dual-Boot Tablets Official
Teclast Pimps Latest Dual-Boot Test Tablet
Onda: Android-Windows 8.1 Dual System Coming
Teclast X98 Air 3G Dual-System User Reports, Again
Teclast X98 Air 3G Dual-System User Reports
Teclast Ships X98 Air 3G Dual System
Teclast Dual-System X98 Air 3G: The Scam
Shock! Teclast X98 Air 3G Dual-System Android/Windows 8.1
Mike Cane’s xBlog 
Sharing internal storage isn’t such a big problem, but what is with RAM, is it split too? How much RAM is aviable to system when is it activated?
RAM is not affected since they don’t run simultaneously.
On Windows, 12 GB of free space is a joke. A single old AAA game can be that big.
Can’t install/run from microSD?
That’s why there’s a microSD card slot and high-speed cards, but lets be honest: not many AAA games are going to be running on a Bay Trail tablet, although I wouldn’t rule out something like Valkyria Chronicles with low minimum specs but huge 20GB filesizes.
So let’s hope it comes to air 2 too with sharing internal storage.
Some guys on XDA managed to get dual-boot on pretty much every X98 Air 3G version (C6J6 / C6J7 / C8J7)
http://forum.xda-developers.com/android/general/teclast-x98-air-3g-tablet-9-7-2048×1536-t2913035/page154#1532
They also fixed the 48Hz bug
Tx. The day I didn’t check for videos, those get posted! *facepalm*
The X98 is only 1.33Ghz, I don’t see any option for the speed increase. Also Windows 8.1 has no option to change installation directory.
It sounds to me as if you were sent the Windows-only version and not the dual-boot version. This is the kind of error I was expecting sellers to make.
With only 32gb, how much free space is available to Windows 8.1 especially with Office 365 installed. Can Windows programs/apps be installed on the microsd? Does Windows have to use FAT32 so that Android can use the card also.
this TECLAST X98 Air 3G is really a good device i think, but i much prefer the ONDA V919 3G Air, becasue it is more convenient to switch the system with only one button, and no need to restart the tablet.
http://www.onda-tablet.com/onda-v919-air-dual-boot-tablet-pc-64gb.html
http://www.tinydeal.com/onda-v919-3g-air-97-android-44-win81-dual-boot-z3736f-tablet-p-143452.html
Which one is the best Teclast X98 air II OR Onda V919?
Please tell me
Owners will have to answer that.
OK ,but at least make comparison between the two(Teclast X98 air II & Onda V919 air)
No. I don’t do that. All the specs are there for you to do that work for yourself.
How to switch from android to windows because my tablet can’t get the login form than can switch from android to windows
I order mine at Ainol-novo.com, but received Air II Android. Was possible to ship back @ € 26,- shipping .. I choose 20 dollar refund, but after like 2 weeks no reply or money. Last time i ordered there.
Hello I have a problem with my teclast x98 air 3g regarding wi-fi … is there a way how to fix this problem please ?
thanks
Yes there is a fix for your Wi-fi.
You are welcome