Yes, Oppo R17 Pro does have the face-unlock function. The phone also has an in-display fingerprint scanner.
Yes, Oppo R17 Pro does have the NFC support.
Yes, Oppo R17 Pro does have the GPS support.
Oppo R17 Pro comes with a SuperVOOC Flash charge technology. It charges the phone in just 10 minutes from 0% to 40%.
No. Oppo R17 Pro does not have the MicroSD card slot. The phone comes with huge 128GB internal storage and it also has OTG support.
Oppo R17 Pro has a lot of points going in its favour like excellent set of cameras, great display and design as well as top-notch performance. I think Oppo R17 Pro can give solid competition to OnePlus 6T going by the overall performance.