I just bought a Deco-X55 (AX3000 Whole Home Mesh Wifi 6 System).  But can not set the device SSID and password. 

1. X55 can connect to internet.  It broadcasts Deco_B1E4, which allows all computers to access internet. 

2. However I can not change Deco_B1E4 to another name or add password.  Right now it's opened to everyone. 

3. I downloaded DECO iOS app.  It  can not see internet when pairing with my router even  #1 above is true

4. I don't see option to configure Wifi in the DECO app

Many thanks for the help