Power off the device, then hold the Power and Volume Down buttons together until the logo appears.
: He began pushing the Global firmware—a clean, expansive operating system designed for the world stage. oppo r11st global rom
However, the on the R11st typically lacks Google Mobile Services (GMS), includes Chinese bloatware, and has limited language options (e.g., no full English UI or no Google Play Store out of the box). Power off the device, then hold the Power
Cons: