There is a shortage of mid-band spectrum in the U.S. for 5G use. These airwaves might not be as fast or carry as much traffic as ultra-high-band mmWave. Nor do they travel as far and penetrate structures as well as low-band spectrum does. But these signals do deliver faster data speeds than low-band and travel farther than mmWave. So when combined with low and ultra-high spectrum, mid-band airwaves help fill in the gaps. In the case of T-Mobile, which is weeks away from closing on its deal to merge with Sprint, capturing the latter's 2.5GHz spectrum will allow it to deliver 5G signals to rural ...