Buzz when on loudspeaker

[Wilson_Yealink]

Hi janisklavins,

Please try below steps:
1. Upgrade the firmware to V73 beta firstly. You can download the firmware from below link:
V73 Beta2 Version Firmware And Release Notes of Version 73 Release

2. Reset the phone to factory. Access to web gui->settings-->upgrade tab, click Reset to Factory Setting button to reset.

If the issue still exist after above steps, would you please help to clear below items:
​1. The issue occurs when you make an internal call(use your extension call extension of your collegue)?
​2. What if you make a ip call(directly dial out a phone ip address)?
​3. How Many Phones do you have and how many phones have this issue ?What's the probability of occurrence on one phone?
4. Does the issue occur while using handset during the call? Or the issue only occurs when you use the speaker mode.

thanks