Rebel44
Member
I would think that if AT&T decided to abandon 3G altogether (which I personally don't see happening in the next decade or two) then i would imagine they would repurpose the current 3G frequencies into LTE or whatever other technology replaces it at the time negating the need for an antenna swap.
Unlike when analog was dropped in favor of digital there are now thousands of devices that will quit working if 3G is dropped.
Mike
I work for one of EU telco companies and in my country we plan to get rid of all 3G and replace it with LTE by the end of 2016.