Wow, that's a bit of a jumbled description.
Is this correct: the virgin device is a USB fob that you insert a sim card into for connecting data over cell towers to your computer and the Kenan device is some type of wifi radio
with an external antenna
for connecting to wifi access points - probably also a usb connection or perhaps ethernet?
Without knowing specifics and what you want to accomplish, I can only offer the following generalities:
1. the antenna on the wifi device will not work connected to a cell device (and vice versa) - it is tuned at the wrong frequencies.
2. you can have both devices connected to your computer at the same time, but why would you? You would only need one at a time to provide internet
3. if the wifi device contains a router, you may be able to plug
the cell device into the router and access it wirelessly - check out cradlepoint and similar routers.
4. all cellular connections will cost money
. Some wifi access points will be free, while others will cost money
Without a clearer description of what you have and what you want to accomplish, it is difficult to be more specific.