There's no place in Orlando that's out of cell phone range. Darn few places in Florida at all, considering how flat it is. No need for a SPOT as long as you're staying close to home. (Merritt Island NWR is out of Verizon range, but okay for AT&T.)

SPOT devices are important for more remote and/or hillier country where you're likely to be out of cell phone range. I just wish they weren't so dang heavy. Still really should carry one on my long runs.