https://rmupdate.com/2021/12/18/oneplus-9-9-pro-oxyenos-12-c-39-update-with-december-2021-patch-download-link/
OnePlus 9 & 9 Pro getting new OxyenOS 12 C.39 update with December 2021 patch and fixes [Download...
Dec 18, 2021 - OnePlus has rolled out OxygenOS 12 stable update earlier this month. After installing the update users report several bugs and issues. OnePlus now seems to...