Chinese smartphone brand Xiaomi is all set to unveil the upcoming flagship Xiaomi 13 Ultra on April 18 in China. However, before that, Leica CEO Matthias Harsch has been spotted with the Olive Green variant of the upcoming smartphone.In one of the photos posted by Leica's Mobile Business Vice President Marius Eschweiler on his LinkedIn account, he was seen holding the olive green variant. It should be...