Have others who have done the LTE upgrade experienced connectivity issues? I called the service center this morning to make an appt for the upgrade, and was told by the service specialist that they've been having quite a few issues with the LTE upgrade, with a significant number of customers losing connectivity altogether. Apparently there's a fix that is on the way via firmware. I didn't get a whole lot of detail, but I called a second service center and was told that Tesla is very close to resolving the issues, and it should be fully addressed within the next month. I've decided to hold off on the upgrade for now.