vivo's upcoming X300 Ultra flagship has been heavily teased, but the company hasn't announced an official unveiling date. A new rumor from a Chinese tipster on Weibo suggests vivo will launch the X300 Ultra in China at the end of March, with March 30 being the most likely date.

This timing follows vivo's previous Ultra launch patterns, as both the X200 Ultra last year and X100 Ultra in 2024 were announced on Mondays. The tipster specifically points to March 30 as the best candidate for the X300 Ultra's debut, though nothing is confirmed yet. If the launch is indeed happening at month's end, vivo should reveal the exact date within days.

While waiting for official confirmation, details about the X300 Ultra's camera system have emerged, including information about its ultrawide camera, teleconverters, and leaked full specifications. The X300 Ultra appears to be positioning itself as vivo's all-out camera flagship, continuing the company's Ultra series tradition of pushing mobile photography boundaries.