Originally Posted by KingOfJericho
If you commute on a train to work everyday, 4G is very necessary. I have wifi coverage the entire way from my cable provider, however it's even slower than 3G. Once I arrive at the office, it's wifi all the way but the train ride to and fro is a different story.
This and privacy. Lots of reasons not to be on company wifi/network all day long. Plus 4G is faster than my home internets.