https://www.cnet.com/news/xiaomi-jumps-into-5g-with-mi-mix-3-smartphone-at-mwc-2019/

Xiaomi's initial 5G wireless partners include Europe-based Orange, Sunrise, Telefonic, Three, TIM and Vodafone. It didn't mention any plans to bring the phone to the US. 

"Essentially everything you loved about the Mi Mix 3 is now coming along with 5G," Donovan Sung, director of product management for the Xiaomi global team, said Sunday during a press conference at MWC in Barcelona.