1.) Please download the below software from your normal computer.
2.) After download, please extract it using winrar.
3.) You will find Android folder.
4.) Kindly copy the folder in to microSD card & put it on charge.
Switch off the tablet and insert the memory card in the slot.
5.) It will start updating the device with new OS.
6.) After upgrade, remove the microSD card and restart the system. it will take 7-10 mins.
7.) After this you can connect the dongle HUAWEI E1731 and let us know if it started working.