@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...

@14paavang I just noticed TP-LINK Support comment that X10 also supports connection preference feature, with newly released firmware update. If X10 are sold in your region, check those: similar form...

@iGOD My apologies, that's all I can help you with. Maybe someone else will read this topic and have other suggestions for you to try. I have Deco M9 Plus in my Deco mesh. They do run stable with...