I believe LTE is still going through some growing pains. Where I work (in Northern NJ) is a 4G area. However, 4G has been down for over two weeks now. Have not been able to connect to 4G at all. And it isn't an issue with the latest Thunderbolt update. After I installed the update, 4G connected fine for about 4 or 5 days and now nothing. Last week, I had to drive down to Newark airport and the entire trip, no 4G. For those not familiar, Newark airport is only about 15 miles due west of NYC.