@ADDolatabadi I would reset both RE200 to their factory defaults. Add the first one to the Onemesh then turn it off. Add the second one, turn on the first one and check if there's any improvement.

@Volkan_Akkus_TR This screenshot is just an example, open your modem and you'll see your actual values. These parameters can change in real time.

@Kostanthsntoysl Follow the hyperlink I posted and choose an appropriate Deco unit to add and extend your wireless coverage further.

@ADDolatabadi According to this feature request the range extender will preferably connect to the main router, not the other range extender.

@Harsh_k WR850 is an ISP provided device with a customized FW version - details.

@Merkaloff Reset AX10 to its factory defaults - press reset button for about 10 sec. Don't turn on QoS. Check your ethernet ports negotiated speed when in wireless router mode here: It should be...