I don't recall having LTE inside the airport. Would say 90% of the time it showed 3G. I did get LTE for a sometime when I was on the airport shuttle going from the terminal 1 to the International building. Then back to 3G. I remember sitting in the food court before flying to Australia and it could barely hold onto the 3G connection as the signal was so weak. I had to give up and hop on the WiFi.