That map is bogus, it may not be showing 1900Mhz at all. Just because they are getting 3G doesn't mean it's on 1900Mhz. I don't think there are any phones that tell what freq. they are using. The only way I know of to tell is to use a spectrum analyzer to see what frequency you are using and it's still 1760Mhz here in Phoenix, not what they claim on the map. All those 3G spots are so far apart it's not too likely that anyone would be able to use one of them unless they drive right up to it though and most of them aren't really where they are shown to be on the map. I thought 3G and 4G towers were hard to find before but this is ridiculous. I'm going to drive to one of those locations tomorrow just to check it out. Out of hundreds of towers there is only one in the E. Mesa area but it's only about 5 miles from my house.