Because official Oppo support pages often phase out older models, most users rely on reputable third-party repositories. Based on current availability, here are common sources:
Developers on Chinese forums (anzhi, miui) have ported MIUI 9 and LineageOS 13 to the R9st by cross-compiling the R9m kernel source. However, these custom ROMs break China Mobile’s carrier aggregation (4G+).
Searching for the usually means you're looking to unbrick your phone, fix software bugs, or perhaps return to factory settings. Since this is an older model (released around 2016), finding reliable download links can be tricky. 1. Where to Download the Firmware
Q: How often should I check for OPPO R9s firmware updates? A: It's recommended to check for firmware updates every week or two to ensure you stay up-to-date with the latest security patches and features.
