https://www.cnet.com/news/oneplus-expects-to-launch-5g-phone-by-end-of-may/

The phone-maker also confirmed that the first OnePlus 5G phone isn't going to be the OnePlus 7, the expected follow-up device to the OnePlus 6T, a CNET Editors' Choice pick. As CNET previously reported, OnePlus will spin up a second line of 5G phones that exists outside its current family of phones (the OnePlus 3T, 5, 6 and so on). This will mark only the second time that OnePlus has created a distinct second line, following the OnePlus X in 2015.

Although it'll exist apart from OnePlus' main line, the 5G phone will look a lot like its 4G brethren externally. Internally, however, will be a 5G antenna that uses the portion of wireless spectrum known as sub-6, which OnePlus says is relatively easier to deploy compared to the mmWave (millimeter wave) portion of the spectrum responsible for the highest 5G speeds over shorter range than sub-6.