Check your exact software version by dialing *#6776# . The China R9s often appears as R9st or R9sk.
A: Search for "OPPO R9s Auth Bypass Firehose" or visit a local repair shop with a JTAG or Medusa Pro box. oppo r9s china rom to global
A: Converting to global ROM does not necessarily unlock your device. The device's lock status depends on the carrier and region. Check your exact software version by dialing *#6776#
Remove Chinese-exclusive apps that cannot be uninstalled on the original firmware. oppo r9s china rom to global
Flashing a new ROM will wipe all data . Back up your photos and contacts.