Bluetooth pairing is not officially supported or recommended between the Yealink phones and the Microsoft Teams client.

Transfer your one-on-one calls in Teams.

 - When you're in a call, select the More option (with the three dots) > Transfer in your call controls.

 - Start typing the name of the person you want to transfer the call to and select them when they appear.

 - If they're in your org and using Teams, turn on Ring back if there's no answer to send the call back to you if the recipient doesn't answer.

 - Select Transfer to complete the transfer or the drop-down arrow to choose one of the following options:

      Work to transfer the call to their Teams number

      Work voicemail to send it straight to their voicemail

      Any other numbers (like their mobile number) they added to their account

Consult, then transfer

 - When you're in a call, select the More option (with the three buttons) > Consult then transfer.

 - Under Choose a person to consult, start typing the name of the person you want to reach and select them when they appear.

 - Consult with them by calling or using chat.

 - When you're ready, hit Transfer.