Helped by key factors like the pandemic shortages and the Huawei bans that shaped the entire smartphone market climate of 2020, MediaTek managed to dethrone Qualcomm and secured its position as world's largest smartphone SoC supplier. The Taiwanese company is expected to maintain this position at least throughout 2021.
https://www.notebookcheck.net/MediaTek-dethrones-Qualcomm-becomes-the-world-s-largest-mobile-SoC-supplier-of-2020.530074.0.html