The Verge has the details on modes and speeds:
By contrast, Sprint is using what it calls “split mode” to allow devices to combine 5G NR and LTE Advanced for faster download speeds and, more importantly, 5G coverage that’s somewhat consistent. Sprint isn’t relying on the same high-frequency millimeter-wave tech as Verizon and AT&T at the moment. Instead, it’s building 5G on top of its mid-band 2.5GHz wireless spectrum. According to Saw, Sprint’s antennas in 5G markets are divided with dedicated LTE and 5G resources. “We are not sharing spectrum. We’re not stealing bandwidth from LTE users, and you don’t see a slowdown in 5G just because LTE customers are using a lot of data.” Saw insists this is something that isn’t possible with millimeter wave alone. “I think we’re the only operator in the US that’s able to launch our 5G network to have the exact same coverage as LTE, right on top of each other.”
But how fast is it? Sprint’s promise is up to five times faster than LTE. “We’re trying to set the right expectations,” said Saw. “You should see more than 100Mbps when you’re driving around.” Sprint drove media around for a short two-mile bus trip to demonstrate mobile speeds. The new LG V50 indeed remained above that 100Mbps mark throughout the test, and it never dropped Sprint’s 5G network during the drive. Peak speeds hit between 500Mbps and 600Mbps when we stopped and were stationary. But Sprint is definitely being conservative in its guidance and reiterating that this is day one and improvements will come early and often.
Full Article is HERE. Emphasis added. Article concludes:
Mid-band 2.5GHz spectrum will make 5G coverage more reliable and steady. And low-band “sub-6” spectrum will be crucial for making sure 5G can strongly reach indoor locations and challenging coverage spots. As you’d expect, he brought up the T-Mobile merger as being essential, since that company possesses a lot of low-band spectrum that would complement Sprint’s own.
The Sprint/T-Mobile low band approach will not produce mind blowing Verizon speeds but will provide enhanced speed over LTE and be more reliable in difficult to reach rural locations.