The Samsung Galaxy S8 comes with the USB Type-C connector. I noticed that the USB-A Male to USB Type-C Male cables that are being sold often have a USB Specification associated with them. The Amazon Basics cables, for example, come in 2.0 and 3.1. Is the 3.1 specification cable required to get the fastest charging speed? Or will the 2.0 cable provide the same speed?
Also, there have been many fast charging specifications like QuickCharge 2.0, 3.0, 4.0. Which quick charge specification and version does the Galaxy S8 actually use for the fastest charge? And is it compatible with older specifications like QC2.0?