I recently had to setup my WiFi to properly handle WiFi calling and this is what I found to help me with it.  So far my calls are clear and I haven't had any user complaints.  I didn't do the pre-survey portion of it because I inherited an environment that this was already done to.  I followed the steps for configuring the SSID and Traffic Shaping and that got it working for me.   Hope this helps!   https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MR_Wireless/Wireless_VoIP_QoS_Best_Practices   ... View more