hey, you may refer to this instruction for reference. https://www.tp-link.com/us/faq-1367.html That's the explanation about TP-LINK DDNS and hope it can help you.

All the clients met the same issue? Is the internet working properly all the time? Have you tried resetting the router? you may try to reset this.

is there any laptop to help you? Accroding to your words first, you also tried Devolo branded pair with same issue. Firstly, we need to figure out whether your home electricity environment is not...

You mean the phone's cell wifi will affect the router's wifi connectivity? Update the FW to the latest one firstly. How about if you set a fixed wireless channel?

It seems the V2 only has one USB port and with new VI. Besides, its cloud function has been updated on V2. This is what I know since I just compared them before:)

That's the advantage of dual band entender. Even your main router/router only supports 2.4G, it will broadcast dual band SSIDs on 2.4G and 5G when you add a extender. No matter which on you choose,...