Why was not ZTE Evdo software was installed in my Windows 8?
The software was not successfully installed because it has not got compatibility issues with the released operating system (Windows 8). The application is only available for Windows Vista, Windows XP, Windows 2000, Linux & Mac OS.
Try downloading from the following link, the appropriate driver for your device and country.
http://www.ztemt.com/down.aspx?on=4&pg1=1.