My partner is working away for three months, she has a laptop and webcam so she can have video chats with me and the kids. It is connected via a 3g card with a 250Mb monthly limit. I'm new to webcams and haven't a clue what this means. Does anyone out there know how many hours of "airtime" this 250Mb limit will give us, or will the webcam drain it quite quickly ? Many thanks.