I have a mifi 2372, It has a hard time staying on 3g coverage, it keeps going back to 2g. I think I've got good connection, its usally about 5 bars. and the 2g is so slow i can barley load web pages. tech support hasnt helped much, I've been told everything from working on the towers to bad weather. I wonder if I am getting kicked off when I go over my data limit. Any thoughts?