You can enter the firmware download area of ColorOS official website, find the corresponding model and download it. Or go to "OPPO official website > service > system upgrade" and enter the firmware download area to download.
At present, the firmware download of ColorOS 1 1 system is not supported, and the firmware download method of ColorOS 1 1 and above systems will be launched in the near future, so you are welcome to continue to pay attention.
Tips:
If the link is invalid when downloading firmware in official website, you can click on the manual customer service to serve you, and we will serve you wholeheartedly.
This answer applies to all OPPO models.