I was wondering if I'm doing something wrong as the wifi config? Hardwired device are all fine and speeds as expected. Router seems to constantly want to move Iphone to use the 2.4g range which result

After the firmware update (1.1.3 and 1.1.4), the Wi-Fi signal became weak and slow. Previously, the Wi-Fi signal was 200 Mbps at a distance of about 10 meters, now it's 30-40 Mbps, and the connection