Did you switch on the wireless radio ? There is 2 switches: 1. hardware on the back of device 2. software - in the menu - both bands 2,4 & 5 GHz.

Model : Hardware Version : Firmware Version : ISP : From the beginning: Is there any limit of q'ty devices connected via WiFi 5Ghz at the same time with Archer C8 ? . Like in title: AP = Archer C8...