Maybe you heard about AT&T's new 5G network and thought "hey, 5 is more than 4 so it's clearly better", and then proceeded to anxiously wait to have 5G on your phone. Good news! It's coming way sooner than you might have expected. Only it's not actually 5G. Confused? That's exactly where AT&T's marketing department wants you. First off, let's clarify. The carrier's 5G network is real but is only going to be available in a very limited number of places at first, as with all new mobile technologies. Also, there is not one 5G capable handset on the market right now. Sure, a bunch of those...
Source: https://www.gsmarena.com/at_t_will_say_you_have_5g_e_on_your_4g_phone_because_marketing_trumps_truth-news-34804.php