Using the stock USB-A to USB-C cable that came in the box with my Verizon GS8+ (Snapdragon processor) works to Quick Charge my Verizon Galaxy S8+ and Galaxy S8 with the following batteries and chargers (Phone indicates FAST CHARGING).....
- An older Anker Powercore+ 10050 (which supports QC2 output on its single port) They have since released an upgraded model that supports QC3
- The designated QC2 port on my Anker PowerPort 6+ (it was QC2 when I purchased in January, and they have upgraded the model they are selling now to support QC3) The PowerIQ ports don't support QC2 or 3.
- The designated QC3 port on my Anker PowerPort 2 (the PowerIQ port doesn't support QC2 or 3)
It also works with Anker USB-A To C cables
My Galaxy Tab S3 only reports Fast Charging when using QC3 charger or battery.
EDIT: Oh, and I had these Anker products to fast charge my Samsung Galaxy S6, Note 5, Note 7 (before i returned it), and Galaxy S7 (using appropriate usb Anker cables), long before I got my Galaxy S8....
And the QC3 chargers/batteries Fast Charge my Galaxy Tab S3.