@Milinn Below is the instruction to setup bandwidth control on the TL-WR841HP. https://www.tp-link.com/support/faq/1944 You can setup specific bandwidth for each device. While it is hard to guarantee...

@JohnH Hello, if ISP still provide phone line(ADSL line) as NBN connection, you can connect it to the Archer D9, and hard reset D9 which will work in bridge mode/ pure modem, then connect the LAN...

@Jure With computer connected to the LAN 1 port, what is the actual wired speed you can get from Archer C7? Have you enabled QoS on the web UI? If so, try to disable it and then run the speed test...

@XDavidT What do you mean it will be out of the segment? What is the IP and DNS of the Pi-hole?

@tlabsim what is the current network diagram? Please provide more information about the current issue. What kind of troubleshooting/settings you have tried yet? Try to modify the wireless settings...

@JoeEric Hello, what is the model and OS version of your smart phone? Do other wireless devices have the same issue? Cause it is more related to the settings of cellphone itself. Try to forget the...