Hi, here are the Teclast X98 Air 3G Dual OS (ID: C5J5) Firmwares. Please click these links to download:Teclast X98 Air 3G Dual OS Firmware Part1, Part2, Part3, Part4.
Password: geekbuying.com
Please download all firmwares, include Bios, brush method and tool.
Have a nice day!