Something weird is happening with the 2.4Ghz connection. When I stand next to the router and connect my S10+ through 5Ghz I get 1.2Gbps! But on 2.4Ghz it struggles to get more than 230Mbps. If I move to the next room it drops to 100 Mbps. I tested an older android device in the next room and it was showing 50 Mbps on 2.4ghz.
I had an old Asus router before and I used to get 400+ on 2.4ghz connection.
Transmit power is on high.
Channel: Auto (also tried fixed less noisy channels)
Mode: b/g/n/ax (also tried b/g/n only)
Channel Width: Tried 20mhz and 40mhz (the result is the same)
Airtime fairness is disabled.
Smart connect: Disabled
I have an Orangpi connected to the USB input on the router. I removed it and tested the speed, but it was the same. So, no USB interference.
What am I missing?