Vivo X100 Ultra, Vivo S19 and Vivo S19 Pro have been certified in China, ahead of their launch in the country. The upcoming flagship Vivo X100 Ultra handset is expected to follow the Vivo X100 and Vivo X100 Pro. Meanwhile, the Vivo S19 and Vivo S19 Pro are likely to arrive as the successors to the Vivo S18 series of smartphones in China.