the signal strength lights blinking means that the repeater has successfully connected to the main router, but the repeater can't access internet. according to your description, it seems that the...

Can't understand this language....

The router can't work as a DNS server itself, but if you have setup another DNS server in your private network, you could set the ip address of your private dns server to the DHCP setting page of the...

This problem is some kind of complicated, suggest you contact the support team at support.ca@tp-link.com suggest you to confirm which devices are your phone connected to, the router or the repeater....

by default the router should not limited the speed, especially for some particular website. may be you could have a try to change the MTU in the WAN setting page, try 1400

can't power 810N via its USB port.