A:Answer I was able to add many 2.4 GHz devices to the common SSID while my phone was operating on 5 GHz band. This is one of the supposed differences with AX (or WiFi 6) and AC. AC operates at 5 GHz, so your phone will connect to the fastest available channel, but the 2.4 GHz devices cannot follow. AX will operate on both 5 GHz and 2.4 GHz so your 2.4 devices can follow your 5 GHz devices. However, if you do run into problems, you can specify separate SSIDs between the 2.4 and 5 GHz bands.