The MTS USB Broadband modem employs a ZTE based device driver. The MTS USB broadband internet modem fails to work out-of-the-box on Mac OS lion 10.7. Many forums suggests that the operating system throws up an error with the screen frozen, asking you to reboot the machine. This is due to the incompatibility of the existing driver that is shipped with the modem. To fix this issue, you may have to install a specific driver viz. ‘CrossPlatformUI-V2.1.2.-SSTL.dmg’. You can download the crossplatformui-v2.1.2-sstl.dmg.
Please note to uninstall or remove your previous instance of MTS broadband from your OS.
Once downloaded, run the installer and plug your usb modem.
Click System Preferences –> Network –> ZTE Wireless Terminal
Apply the following settings as shown in the screenshot. Enter password as ‘MTS’
Click on connect, and you should be able to access the internet.
You may come across the following error window.. ( The communication device selected for your connection does not exists. Verify your settings and try reconnecting )
In this case, double click the MTS application icon on the desktop and try connecting again.
Another link to download other ZTE and Huawei drivers for different operating systems.