cannot read...any english version?

any firmware update available? what is the firmware version and hardware version of your router?

You may check whether the note for firmware 170111 saying something like this firmware cannot downgrade etc... I cannot read Japanese, so... Any way, regarding the major issue, you may try to change...

It is true, I've tried to connect a USB modem to the router but it doesn't work, tplink told me the usb port is used to connect hard drives etc. while for the AP extender, do you mean connecting the...

Your IPTV can also connect via WiFi? who is your ISP?

The direction of the antennas could affect the wifi signal or wifi range, so you may try to adjust the antennas to see which direction is better for wifi range