Fiber is the true backbone of wireless technology. Fiber connects 5G cell towers back to the internet and is capable of supporting the demands of the 5G wireless network. Copper wirelines are simply not fast enough to deliver the speeds promised by 5G service. For this reason, 5G technology could not function without a robust fiber optic network. You may hear competitors of AT&T tout their 5G network, but none of them have the fiber footprint that AT&T has. In fact, AT&T Fiber is available in 21 states, and the expansion is ongoing. You can check out current AT&T Fiber coverage and check availability at your address here.