Pete Lau, OnePlus CEO, announced plans for a 5G smartphone back in the summer. At the Hong Kong 4G/5G summit, hosted by Qualcomm, his co-founder Carl Pei said the company is on schedule for an early 2019 launch and we expected that the phone might be the OnePlus 7 (or whatever the OnePlus 6T successor is named). Apparently this isn't the case, as reported by as a OnePlus spokesperson announced the 5G device will not be a successor of the OnePlus 6T and will most likely arrive in a different category with a higher price tag. Cristiano Amon, Qualcomm president, and Carl Pei on the stage...
Source: https://www.gsmarena.com/oneplus_5g_smartphone_completely_new_moniker-news-34173.php