@DAWO57 There is no meaningful difference between X50 and X55, if going with these just pick one that costs less (or on sale). No sure how to define "stable and reliable", but I recently upgraded my...

@YahyaKm Firmware upgrade is standard recommendation, so my answer is: yes, you should. I would also suggest to swap two Satellites. Remove them from Deco mesh, swap units with their power supplies,...

@Elyadh 1. Vodafone router will not join Deco mesh. Deco mesh will run its own WiFi network, even in AP mode. Other than that, setup you plan should work. 2. In Access Point mode Deco do not have to...

@YahyaKm In that case you should check Hallway Deco power supply, if it is plugged to power bar (not recommended) and everything related to electrical wiring around that Deco. If you are using...

@YahyaKm With Deco X55 you can manually configure how satellites connect to each other, using connection preference feature: How to select a preferred signal source on the Deco App

@DAWO57 I think you should consider Deco X-series. They are WiFi6, which means they should deliver gigabit speeds, which would be future proofing. They are of reasonable price comparing to WiFi7 Deco...