I purchased 2 OPPO R9plus phones and can not get any proficient technical support from Woolworth or OPPO for basic performance issues.
in contacting Woolworth and OPPO tech support I got people who did not comprehend the basic issue of connecting these phones to a windows 10 computer, they fumbled with extra programs that replace those issued with the phone and required the cloud.
Take a look at Samsung who have kies3 as a simple download and give a seamless interaction between phone and computer.
there are other issues with phone banking and Garmin products.
Whish I could return the phones.