I generally use my MiFi 6620l for internet access on my laptop. If I do not use the laptop to access the internet for a period, say an hour, the MiFi will periodically disconnect and I then have to reconnect. Is this normal? Is there a setting I can use that will keep the connection alive (but dormant) even if I am not actively using the internet. Today, for example, it dropped the connection some four times. Thanks.