@David-TP 

Thank you David-TP,

I just got back from a business trip, so sorry for the late reply.  I have to ask.  For an MSRP of $449.00, why would I need to clone my MAC address from my Archer AX3000?  Why can't TP-Link release an appropriate firmware or produce a working web user interface or update the Deco app?  The current version of the Deco app is terrible.

And yes, I already followed the "Unable to connect to the Internet" link.  

I have purchased for myself, my parents, and my organization over the last decade multiple unmanned TP-Link switches, Archer AX300 --> Archer C9 --> WR1043ND --> and previous TP-Link wireless G routers.  The XE75 has been the first dud from TP-Link and should never have been released.

Do you have a beta firmware you can send me?  

Thanks, Chris

  @ChrisHiss 

I had this similar issue started Thursday. Spent several hours, 8 plus troubleshooting, multiple resets, power cycles, unplugging wired connections,TP link chat support , etc..

ISP said no issues with modem. Looged a ticket with TP link on the phone, no one could reply back until after Oct 7th. So I called ISP again, they mentioned some cable signal strength issues. Tech came out next day, didnt find enough signal issue to affect the system. He ran some tests on his devices, mentioned that it looked like my signal was getting "stolen" from inside the wifi. One of my Deco's had a huge spike in the download speed, to the point of stragling the network. He suggested changing the password. So I unplugged all Decos but the main one, which actually gave me some Wifi, then i spent all day Saturday on adding everything back to my network with a new PW. This has fixed my issue, so far. I have around 50 devices, Three Deco X75Pro and one X50 outdoor.

  @Willis71 So he mentioned someone had figured out your Wi-Fi password and was stealing bathwidth? Curious if you managed to see the device logged/listed in your Deco app?

  @Willis71 

I spent 4 hours figuring it out last night.  There is a glitch in the Deco App when setting the main Deco up after reset.  I noticed during the "Creating your Wi-Fi network..." step, the LED on the main Deco was turning from blue to red, indicating a problem with setup.  However, the Deco app still allows you to proceed futher into the setup process nor tells you there is an error during the "Creating your Wi-Fi network..." step.  Only after proceeding further in the app is their a pop-up notification stating "This Deco Network has been deleted."

There are three variables during the Wi-Fi set up process in the Deco App:

• Name of Deco
• SSID
• Password

I set up my main Deco with the following and for some reason was making the main Deco LED turn red.  I am not sure if there is a character limit or something else the Deco App doesn't like during the setup process:

• Basement (custom name)
• HTTP 404 Not Found (ironic, I know)
• 18 digit password

I evenutally got the Deco App to finish the setup process by using the following:

• Bedroom (preconfigured name)
• Test
• 88888888 (password needs minumim of 8 characters)

I then went back into the Deco app after the setup was complete to reconfigure everything how I like it.

I also suspect ethernet ports on at least two of my Decos have stopped working.  I have hardware version 1.6.  I have read online that this is another issue with these Decos.  Port #1 on my main Deco has my raspberry pi plugged in acting as my DNS for pihole, and I cannot connect to it, nor is is blocking ads.

On the Deco in my family room, I noticed in the Deco App stated it was connected back to the main Deco via 6GHz.  (All my Decos are hardwired to unmanned switches).  I switched the ethernet port on the Deco and then it showed as was hardwired in the app.  I'll have to hook up a laptop to each of the ethernet ports for all Decos later this week to see which ones are fried.  If they are, I still have 14 months left on my warranty.  Looks like they went through a couple hardware itterations (1.0 --> 1.6 --> 2.0 --> 2.6), so I am hoping the newer ones are built better.