Sascha Segan / PCMag: Testing carrier networks in 26 US cities shows that while 4G speeds are up overall, 5G does not live up to the hype, with AT&T's 5G largely slower than its 4G  —  After a decade of testing 3G and 4G wireless networks, this year we drove around 26 US cities amidst a pandemic to determine whether 5G is ready for prime time.