Seems odd. What kind of WiFi are you using? Is it perchance a mesh network of some type? Have you tried, at least temporarily, wiring a single Sonos device to your router with an Ethernet cable? Is the WiFi on your iPhone turned on? Have you called Sonos Support directly to discuss it?

Hi Bruce,

Thanks for your answers, and yes i have tried all of your suggestions already. I wired a SONOS Soundbar to my router directly and saw no change in performance, i still got lots of wifi disconnects.

My WIFI uses an EE Fibre to the home connection and i get from 650 Mbps to 1 Tbps down and around 150 Mbps UP. So plenty of bandwidth !
I use the EE Brightbox 2 standard wfif router which comes with my EE package.

I rang SONOS a couple of times and they said ‘disconnect everything, reboot wifi router, do any upgrades to software, then reconnect everything, and try to make sure all SONOS products are all connected to either the 2 Ghz or 5 Ghz links on your wifi router’ 

After doing all of this i still get lots of annoying dropouts especially on my SONOS ONE speakers, and my iphone needs to be rebooted to get connection back to them usually.

Odd and annoying indeed !
cheers, Barry

I have unable to connect repeatedly - have been through the same suggestions … Not great

Note that the bandwidth you quoted is between your router and the outside world, it has little to do with the speed between your router and the speakers. Which is why the Sonos folks were suggesting their procedure, and probably why your iPhone is having trouble staying connected to the system. To get the maximum benefit, of course, the Sonos devices need to be powered off during the router reboot, that way when they get plugged back in afterwards, they receive a fresh OS load, updated DNS info from the router, and refreshed IP addresses.

Unfortunately, I don’t get access to the data in your diagnostic, that’s reserved only for Sonos employees, likely as it has data in it that identifies your system and runs afoul of GDPR. 

I’d certainly reread the wifi interference FAQ, too, to see if it is possible that you have some sort of issue there. I’ve certainly experienced it, both from a failing microwave, and a neighbor’s router who set up their signal on the same channel I was using. 

But beyond those suggestions for you, I don’t have any further. I certainly don’t have any dropouts in my system at the moment, and I have several Sonos Ones in use in different rooms. 

Thanks Bruce and all good suggestions ! Actually we did have a dodgy Microwave oven but i got rid of that a while ago and still have dropouts.

Also you never know what the Neighbours are up to really either ! But i think they are OK.

Yes its hard to know exactly what the bandwidth is to each SONOS speaker …..but my PC’s connect using WIFI and they get good UP and DOWN speeds when i a use a network speed checker. 
I will try a reboot and power down of all SONOS speakers as you say so they get new IP addresses from the DNS server, after the ROUTER comes back online.

I will read that WIFI interference guide again, and get back in touch with SONOS again if there is no improvement. One other option is to buy a much higher spec router with better MIMO antennas i suppose !

Thanks for your help,

Barry