@jppouma 

Hi, welcome to the community.

Is the firmware version of Deco BE65-5G 1.1.0 Build 20250730 Rel. 54880? How about the firmware of Deco BE65?

Can you also share some screenshots of the network map on the Deco App, such as:

"Lorsque je suis à proximité de la borne maitresse, aucun souci pour obtenir une adresse IP... mais lorsque je me déplace, les autres bornes n'arrivent pas à me donner une adresse IP."

-Were you having issues with both the Main WiFi network and the Guest network?

-Did you also test with different mobile devices?

Please also manually restart the whole Mesh network once to see whether it made any difference.

Wait for your reply.

Best regards.

  @jppouma 

Hi, thank you very much for the update.

"J'ai testé avec plusieurs téléphones portable (iPhone 15 max pro, iPhone 10)

Quand le résau est actif, je n'ai pas de souci avec les appareils fixes !"

 -Do you mean that you only found iPhones can't get IP addresses when they tried to connect to satellite BE65 units, but the Windows desktop devices seem fine with satellite Deco?

I'll also follow up on your case via email and ask the senior engineer for further assistance.

Please check whether you can receive my email later.

Best regards.