@Kevin_Z I've done as you instructed.

@Kevin_Z Just a heads up... For the past year or so, ever since the introduction of OneMesh for the AX11000 v1, I've successfully used two RE550 range extenders with the router in OneMesh mode...

@LukaszM Thanks for your input. I have heard of the shielding issue, but the problem happened whether I had anything connected to the USB ports or not. In any case, this all went away with version...

@m1hn3a and @Kevin_Z I can confirm that Connection Alerts in Tether are unavailable. And yes, it would be an excellent idea to be able to choose the SpeedTest server.

@Kevin_Z As per your request... My modem was replaced with an Arris TG3442S and now the time is syncing perfectly. I can also connect my range extenders in OneMesh and log in with my TP-Link ID...

@Kevin_Z The problem with the time being completely out of sync and not being able to log on my range extenders using my TP_Link ID is driving me nuts. I'm having my modem (a Technicolor CGA4233)...