Verizon has set a bold goal for itself with plans to release 20 5G phones in 2020, according to CNET.

Verizon Wireless CEO Ronan Dunne announced the company’s plans during an interview at CES 2020. At four times the number of 5G phones the company released in 2019, 20 represents a significant uptick. In spite of that, Dunne told CNET “he had to turn down vendor partners wanting to build 5G phones.”

Currently, mmWave is the fastest 5G available—with speed measured in gigabits rather than megabits—but has very limited range and building penetration. T-Mobile and AT&T have both opted to build out low-band 5G networks, in addition to their mmWave offerings. Low-band is slower, but has far better range and penetration. Verizon, however, is focusing almost exclusively on mmWave. As a result, their 5G network does not have the nationwide coverage T-Mobile currently has.

Since device manufacturers build phones that will appeal to the widest audience, it makes sense that many would prioritize phones that take advantage of the low-band spectrum. As CNET points out, the fact that Verizon has already had to turn down vendors is especially reassuring given their focus on the mmWave variety of 5G.