A couple of years ago I moved from an apartment to ATT fiber to one that was only served by ATT Air (their wireless plan). Went from symmetrical gigabit to lucky if I get a single megabit download. Switched a month later to a T-Mobile wireless modem and got acceptable speeds again (still orders of magnitude lower than fiber). An ATT commercial tech in my office told me this is because ATT uses a gigabit backhaul on most towers while T-Mobile uses 10G.
Wireless is obviously not an upgrade from wired, but even then my experience in Texas is ATT will cut every corner possible.
