AT&T's new home-phone technology has gained an FCC approval that could open the door for transitioning more communities from old landlines.

AT&T (T) gets FCC approval to replace old copper home phone lines with wireless technology, expanding 5G network and fiber coverage for growth.

The energy then travels via a wire, like copper lines, before being converted back into sound waves for the receiving phone. Newer home phone lines, like AT&T Phone, rely on Voice over Internet ...