Problem with setup

[MountainGuy]

I have a thread somewhere here where I had similar problem.

In short, I suggest:

1. Update your Phantom first by connecting directly to router without dialogue.  Update your phantoms one by one.    DONE !
2. Then try again. SHould work.    DONE !
3. Make sure you do a complete reset of all the components before 1 and 2 by pressing the buttons on the Phantom 3 times quickly. Same with Dialoge.  Even unplug your router for 1 minute.    DONE!

Hope this helps.   NOPE :-(

I have nothing to add with my knowledge, but I think the Dialog they sent me must be fucked. 

Just do the factory reset on the good way and not discribed as above
See help from the devialet site

Of course, JohnnyDev is correct. I realized that I was giving you the Cliff Notes version which was incomplete.  Apologies if it wasted a bit of your time.