hi foxy999, you can try this beta firmware. http://static.tp-link.com/Archer_D7v1_1.6.0_0.9.1_up_boot(170303)_2017-03-03_11.02.39.rar

if the 3G/4G ip address on router page is private, then you have to contact service providers and ask for a public ip. Or return the router

have you tried a different web browsers? clear cookies?

[/FONT]hi empee, have you tried this beta utility? http://static.tp-link.com/beta_PowerlineUtility.zip @phone UK50, on the tplink website, there is powerline scan utility for windows, try that and...

no big difference, only the appearance is different.

are they in the same breaker? can you try different location or sockets to test? if no changes, it's suggested to submit a ticket to TP-Link support.