Here are Teclast X89 Dual Boot (E7ED) newest win8.1 & android4.4 firmwares: part1, part2, part3, including dual boot system files, flash tool and flash guide.
This firmware is only fit for ID: E7ED, please don’t flash other IDs.
1, please download all packages.
2, when gunzipping, please select 3 packages together, and gunzip synchronously. Don’t gunzip one by one, it will cause some files lost.
3, please read the flash guide carefully before operating.