Hi ​@Daniela Sierra 

Welcome to the Sonos Community!

Sorry to hear of this issue you had with pairing your Ace headphones.

Please note that pairing Ace to a new device does not involve the Sonos app in any way. You only need hold the pairing button and go to the Bluetooth settings of your source device. 

Please also be aware that it is best to break the connection to one device before attempting pairing with another. This should be done in the relevant device’s Bluetooth settings.

Finally, you can tell Ace to connect to two source devices simultaneously - just activate the multipoint connection option in the Sonos app when Ace is linked to the device running the app, and Ace will automatically connect to the last 2 devices it was paired with on power-up. If this was already activated, there would have been no need to re-pair your iPhone.

I hope this helps.

I have paired the Sonos Ace here with 4 devices, iPhone, iPad and two different brands of Bluetooth Transmitter - Once paired, the Ace will connect to the last/most recent paired device (if in range and powered on, or the last two devices if multipoint connection is enabled).

If the last BT paired device has its beacon disabled, or is powered off/out of range etc; then the Ace connection (on power ON) falls back to the previous pairing in the list and that device then takes priority over the connection to the other devices …and so on and so forth.

If I want to add a new device to Ace, that’s in BT pairing mode, I long press on the Ace power button until I hear the pairing tone to add/connect to that new device and it adds it to the top of the Ace pairings list.

What would be ‘a nice to have’ feature though is a display of all the Ace/device pairings listed in the Sonos App and to be able to switch between them in the App itself and prioritise the order in which the Ace connects to them, and to be able to remove/archive a previous pairing. 

I’d personally prefer to archive a pairing, as that then allows them to be reinstated later and to have the option to delete the devices from the archive list instead.

Ah I realise now, I’m asking for far too much here - So just a list of Ace/device pairings will do in the Sonos App with the opportunity to switch the connection between them. (feature request)

‘Happy New Year’ to everyone here too. 🥳