Hi Sonos Community,

I just had a very frustrating week trying to get my SONOS PLAY:1 speakers to reconnect after I updated my home Wi-Fi with a new modem. I followed all the SONOS troubleshooting instructions (e.g. resets, turning the modem off/on, trying the older app) and read all the community topics, but nothing worked.

Today, I finally got my PLAY:1 speakers reconnected by factoring in one vital step that the SONOS troubleshooting does not include. 

1. Remove other devices on your home Wi-Fi network prior to reconnecting your SONOS PLAY:1 speakers. Before removing the other devices, type in your modem ip address in the search bar of your computer and log in to see what devices are using the network. Systematically disconnect them from the home Wi-Fi (e.g. Smart TV, tablets, computers) until you’re left with just your phone with the SONOS app and connected to the home Wi-Fi. NOTE: I did not reset my modem. I left it on and it was connected all the time.
2. Do the factory reset with your PLAY:1 speakers.
3. Go to the SONOS app (not S1) on your phone, log in, and do the reconnection. 
4. Reconnect all your other devices back onto your home network. 

This process worked for my PLAY:1 speakers, and perhaps it might work with other models. Good luck!

All the best, Mark