Any advice? At this point it looks like the S7's will have to go back.

@David-TP Thanks for the feedback. I have tried that as well. the setup is Internet <----> Fibre ONT <----> Deco S7 #1 in Router mode <----> Deco S2 #2 <----> = ethernet cable backhaul No additional...

I recently bought a 2-pack DECO S7 system to get rid of dead spots in my house. All works fine for most devices, except for my wife's Samsung A32. Every now and again it goes back to 4G connection,...