Yes, my car has LTE via a retrofit. The loaner car also has LTE.
Tesla updated the FW in my car to 2017.48 but it does not correct the problem. Tesla's solution is to use your cellphone to make a hotspot to which the car connects via wifi. However, there Is an issue with this, besides the obvious issue of burning thru your data plan. When you put the car in Drive, the car switches from the wifi connection to LTE. So you have to wait to you are driving and then connect the car to your cellphone. You stay in wifi until you put the car in Park and again place the car in Drive from Park.
Tesla updated the FW in my car to 2017.48 but it does not correct the problem. Tesla's solution is to use your cellphone to make a hotspot to which the car connects via wifi. However, there Is an issue with this, besides the obvious issue of burning thru your data plan. When you put the car in Drive, the car switches from the wifi connection to LTE. So you have to wait to you are driving and then connect the car to your cellphone. You stay in wifi until you put the car in Park and again place the car in Drive from Park.