@Tony unfortunately there's no official support in Iran.

@Tony the issue is still persistent. do you have any idea how to fix this problem?

Tony wrote Both the router and modem gave low latency then your latency was high when directly connecting to the modem, but disconnecting the router solved it? Yes exactly, @Tony I tried your...

I have a D-Link ADSL modem (2740u) and TP-Link C7 wireless router. The modem is responsible for internet connection and the router provides an access point. The router is connected to the modem by an...