you have provided very helpful information
But please help us to root the device successfully because it would be next level of advancing for our mobile to achieve new heights with its capable hardware
i have OPPO R9S recovery by wuxalin
tell me how to backup or extract the recovery of our rom
which software is required?
oppo tools version?
post the instructions so i can take the risk
Please note that this method only works for Android 6.0 Marshmellow.
Unfortunately the recovery.img you have to ask from Duy Anh