I replaced my Apple Time Capsule with the Deco M9. I only installed one base and set up it successfully.
I kept the same SSID and PW from my previous Apple Time Capsule. The Time Capsule is unplugged and powered off.
Setup --> Verizon Modem (Wireless Router is turned off) --> Deco M9 via Ethernet Cable
Some devices connected with no issues. Others did not. For example:
- iPad Pro - connected no issues
- iPhones - does sometimes, but then disconnects; when I select the SSID, it asks for a PW which returns an "incorrect password" message
- Apple TV - does not automatically connect
- MacBook - connected
- Chromebook - connected