*Updated, with Teclast X98 Air 3G Android 5.0 Lolipop version 2 download* Getting a few requests for this one Teclast X98 Air 3G Android 5.0 custom rom, so here’s file download below. Flash it with Intel MFG tools like you would with other X98 Air 3G roms. See this guide video below to help you, if you run into issues coming from Android 4.4.4, do a full wipe. Many thanks to Mirek190 for his great custom roms. Looking forward to Lolipop version 2 due for reason soon.
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X98 Air 3G Bios v2.02 (The latest) are here:
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Warning: Flashing bios has a slight risk of bricking your beloved X98 Air 3G. I have had a brick before and it requires an EPROM flasher and opening the tablet up.. So before you flash, make SURE you understand the risk at hand and use a fully charged battery. Flash it in Android reduces the risks. I’ll not be responsible for any bricks, you have been warned!
Source: XDA