@Help2023 Hello Help2023! I think I did it. Gave my extender an permanent static IP and changed the settings in the Tether app just as you shown. It's working, for now. But, I've a 2.4 Ghz Wi-Fi...

@Help2023 Yes, I did change DHCP setting from auto to enable and put the entries just as you did. But unfortunately, nothing fruitful happened. It (the extender) was working very smooth with the last...

@Help2023 I tried your this setting but it didn't work. Thanks for your help.

@Help2023 I think, I should enter 192.168.1.9 in the destination IP Address as my extender's IP address is that as you can see in the first image of my last reply. Don't you think so? And in two of...

and in the Interface, there is one more option that is "Internet" other than LAN.

@Help2023 Okay! I checked on my router for this setting. On network map I found my extender's details (img 1), on routing section in network settings I found the settings (most probably) you are...