Hi @Nbnmrhamoui . When you have your wifi device very close to the router, tap the connection in the wifi settings screen. It will show the actual connection speed between the router and device.
How does that compare to your NBN speed?
The 5G speed will be better than the 2.4G speed.
May we know the speed that you are getting when you are connected to the WiFi?
What troubleshooting have you done so far?
Are you using the 5GHz or 2.4GHz network?
We'd like to assess your case and more information is required for us to come up with a reasonable resolution.