Did you keep the same WiFi name & password when you changed supplier?

If you do this, you shouldn’t need to reconfigure any wireless connected devices.

Thanks, I will try that, but it seems crazy that you have to go through this. Every simple change causes problems, different ones each time, no rhyme or reason. Spent hours on this, gonna give it one more go and if it fails then they go in the bin. Many thanks for your response though, much appreciated.

If I attach the sonos to the router with an ethernet cable i can see the speaker on my app, I can play music on it, I can change its name. Once I take the ethernet cable out, the speaker is no longer seen, it can’t find it even though it just did, I have followed unpteen set of instructions except changing my wifi name and password as this seems like a wrong solutions, I have fiddled around with resets and everything and basically have no idea except that nothing works.

https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network
 

 So this did not work?

If you have new WiFi name and password, then connect to wired temporarily, then change the WiFi network in Sonos App, and disconnect wired:

https://support.sonos.com/en-gb/article/switch-sonos-between-a-wireless-and-wired-setup

@craigski that is only possible if you have devices which are supported for app switching on the page @MoPac has linked to.

The wizard isn’t very good at telling you why it can’t find older products. I was trying to switch 4 and it turned out they are all gen1 products which don’t support App switching. Wifi wizard says no products found, my system list shows 4 products. 

There is also this little snippet in the connect to new router/wifi page under unsupported products.

If you have any of these products in your Sonos system, first go through the above process of updating WiFi information for any supported products. Once your supported products are updated, factory reset any products that could not be discovered, then add them back to your Sonos system.

So if you have a mix, it sounds like you can use the app for the supported devices, but then still need to factory reset anything in the unsupported list. Definitely looks like potential for a network to end up with some connected to wifi and some not unless you read the right page properly.

Nope, tried several times failed every time

Tried and failed

So I have 2 play ones, had no joy on either, brilliant speakers but only if they work

It is insanely difficult.

My problem is I have two sonos systems at two different locations, each with its own wifi router and unique SSID. After spending days trying to get the sonos app to control the two systems, I finally concluded it was impossible unless the two routers shared the same SSID. While I could have made the SSIDs the same, it would mean reconnecting a myriad of existing wireless devices. Instead, I happened to have two old, unused wifi routers lying around. I connected one old router to each location’s router (creating a subnet as a result). The two old routers were then given identical SSID and password and I connected my sonos systems to them.

Is this an overkill and a convoluted solution? Absolutely. Are there simpler methods? Most probably. However, after several frustrating days, I am just glad it is done and dusted and I won’t have to mess with it again.

This is incredibly frustrating, I have reset my Play 1, I have connected it to my router via an ethernet cable, I added it to my sonos app, I played music on the speaker, I remove the cable and zip, I go to manage network, I go to update networks, it says finds no products. I put ethernet cable back in speaker, I see speaker shown but nothing plays, so I now have a speaker showing but does not plays what is the point of update network if it does not show a network and does not show a speaker that is wired to that network that shows in the app that does not play. Honestly you need to be Albert Einstein to do this, all I did was change my internet provider and then you lose any money you invested in Sonos products as well as huge chunk of time. Sorry for rant but this ishould be soo bloody simple but is anything but.

Woohoo, I have managed to do one speaker, not sure how. Have followed the same procedures that have been done multiple times but randomly the last attempt worked.

I completely understand your frustration. 
 

If you get to the point you plan to write off your Sonos investment, may be give my setup a try if you haven’t attempted it: get a second WiFi router and connect it to your primary router (by a physical cable). Give this new router a different SSID or use the SSID of your previous ISP’s. Finally reset your Sonos components to connect to the new router. Effectively you will have a dedicated router for your Sonos system. In a way this is similar to the old Sonos bridge setup. I like this solution, despite its complexity, because it will insulate your Sonos system from future ISP changes. If you ever need to move your system to a different location, just bring the router with it. 
 

The secondary router doesn’t have to be fancy. It just needs to relatively modern supporting both 2.4 and 5Ghz connections. And if you end up buying a new router, you can always return it if it doesn’t work. 
 

Best of luck

This is *another* known issue… that used to work seamlessly before the new improved experience… no ETA… Which is becoming a long list. 

Surely it’s just simpler to change any new router to the SSID/password combination of it’s predecessor and not just use the default? 

Changing the new router’s SSID and password to match the original would indeed be the simplest solution. I have decided to use a secondary router because of the a large number of devices already using the existing SSID. 

I have also attempted to solve the problem by setting the *guest* SSID of the 2nd location’s router the same as the 1st location’s SSID. That somehow didn’t work either.

I am certainly no computer networking expert but do know (just) enough basics to connect all my electronic devices at home. Even so I find dealing with Sonos products challenging in but the most basic configurations. Looking back, I wish Sonos had kept the bridge instead of exposing the users to the networking details of their devices.