irsea00:
Looking at the specs on your iPhone version, you should be able to access voice and data on 850 MHz (3G/UMTS) and 4G/HSPA+(1900) anywhere in Florida and the U.S.
Just to clarify, Band 4 LTE in the U.S. uses 2100 MHz on the downlink paired with 1700 MHz on the uplink. AT&T does not use 2100 MHz (stand alone frequency), 1800 MHz, or 900 MHz in the United States even though U.S. phones show those frequencies in the specs. That is a GSM standard (world phone)
AT&T is now using all bands (2,4,5,17) for their LTE deployment in many states. Band 17 (700 MHz)is the preffered LTE band but in areas where they don't have the spectrum, they are using 2&5 (1900 & 850). Band 4 is being used primarily in areas in addition to B17 to increase capacity in heavy populated areas. 4G LTE is not available in all areas of Florida so I would check the coverage map. Other than that it should work well....just make sure the setting is your phone is set correctly.
