Yealink phones using Yealink wi-fi adapters (e.g., Yealink WF40), experience garbled and choppy audio. Additionally, if the phone using an adapter reboots, or a new config is generated, it will likely downgrade the adapter firmware.
List product versions and/or device environments/platforms that this solution applies to...
In the case of the firmware being downgraded by a phone reboot or config change, complete the steps to reconfigure the adapter.
- Factory reset the phone.
- Upload the adapter firmware.
- Reprovision the phone to 8x8 servers.
This is a known issue with the Yealink wi-fi adapters (WF40).