Switching to a 4G Mobile Broadband Device - VZAccess Manager (Windows)
Ensure the 4G USB modem is properly inserted into the computer's USB port.
Launch VZAccess Manager. From the Windows desktop navigate: Start > Programs (All Programs) > VZAccess Manager. With Windows 10, click Start > Apps icon (located in the top-left corner) > All apps (located in the bottom-left corner) > VZAccess Manager.
Click Yes to switch to the 4G USB modem.
If presented, enter the PIN then click OK. The default PIN is 1111.
To connect, click Connect / Connect WWAN (lower-right corner). If Connect / Connect WWANis greyed out (disabled), remove then re-insert the USB modem.