https://www.reuters.com/article/us-oi-5g-huawei/brazils-oi-to-test-5g-in-rio-music-festival-using-huaweis-gear-idUSKBN1WB2UR

Brazil's telecoms carrier Oi SA is preparing to test fifth-generation wireless network (5G) during the Rock in Rio music festival, using equipment provided by China's Huawei Technology Co Ltd [HWT.UL], to conduct one of the largest trials of the technology in Brazil.