Oppo R9s Plus Firmware Qfil -

Search for "CPH1611 QFIL firehose" on 4pda.to (Russian forum). Use a translator. They maintain the most reliable archive of Qualcomm programmers.

: Typically achieved by powering off the device and holding both Volume Up + Volume Down buttons while connecting it to a PC via USB. Oppo R9s Plus Firmware Qfil

Your PC needs these to recognize the phone as "Qualcomm HS-USB QDLoader 9008" when it’s in EDL mode. Search for "CPH1611 QFIL firehose" on 4pda

QFIL will display and the phone will reboot automatically – if it doesn’t: Oppo R9s Plus Firmware Qfil

You likely need the package if: