I recently upgraded internet speed to 400mbps from 100mbps. Immediately had great results with 5ghz reaching 400+speeds. However 2.4ghz actually became slower than before I upgraded. Speedtest.net showed avg speed of 55-75 mpbs with 400mbps upgrade. Is that normal or should speed be higher for 2.4? Spectrum said line connection is fine so must be the router. I rely on the 2.4 for security system cameras. Firmware is updated as of 05/13/2021.
