It’s interesting that using Xim-like devices (Cronus Zen/Cronus Max) is a bannable offence on some games. They have to draw the line somewhere… one could build a device using OpenCV to recognize enemy characters and auto-aim towards them, basically adding aim-assist to games that don’t have it.
USA still has 2G, but 3G is definitely no longer around. Those frequencies have been portioned out for 4G LTE and 5G.