I also live in North West Palm Bay Off of Americana Blvd & when I woke up this Saturday I had a nice little surprise in the notification area of my phone, there was this little 4G symbol. So far I have had it ever since. Was kind of afraid they were just testing & it would go away, but not so far.
Forgot, I am getting 7-10mps download & 4-6mps upload. FYI.