@Already_Taken https://www.tp-link.com/us/support/faq/1457/

@Chau-TP In the settings app on your iPhone, under WiFi, check under your WiFi by clicking the little i icon. Is Private Wifi Adress clicked? Meaning, Rotating or fixed?

@TBathke Away from home at the moment, but can you mark in the image where the routers are placed on the property. Might give an idea if placement could be the problem. Also, there's height of each...

Not to sure what you’re describing, might be easier to make a quick sketch of your home’s floor plan on paper (or ms paint) and the location of each unit. So far it sounds like the wall between the...

I haven’t, but have you tried restarting all routers by unplugging them for 30 seconds? Seems like the main unit could be offline.

Not sure if this is the place for you to ask, but consider this as a free bump to the front page. Good luck. 🍀