@Sampubre Did you copy all WAN (Internet) port settings from your old router to the WAN (internet) port settings of the AX72 Pro ?

@dipin4 Follow this guide to troubleshoot your issue.

@shubham07481 You probably should follow this thread regarding your issue.

@Mohaideen_20186 Try resetting the device to it factory default by pressing the reset button for about 10 seconds. Then check if there's any improvement.

@undefined Go through this solution and check if it helps in your case.

@splashscuba Replacing the cable between the ISP modem and AC1200 sometimes helps when it causes any issues. What else you could try is to connect a PC directly to the ISP modem and test the ISP...