I am going to travel in the USA with my Samsung Galaxy SM-G900F phone, whose 4G network frequencies are 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600.
I want to use AT&T, which I read
uses 700MHz as it's primary LTE frequency. AT&T also uses 1700, 1900 and 2300 MHz frequencies as its supplemental coverage in some markets, to provide additional LTE bandwidth.
How good is the AT&T coverage for the 1700 and 1900 frequencies (which are the only frequencies that both AT&T and my phone has)?