|4g is an expensive way to surf I'd think. A home isp seems like would be cheaper and faster and not suffer the fair use deal.|
4g isn't fast by home standards.
As to why it fails is unknown. You'd have to survey the signal and any interference that may be nearby. Could be falling back to 3g, could be user load. Could be the guy next door with some grow lights who knows.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.