Voice Over Wi-Fi Market Size and Forecasts (2020 - 2030), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Voice Client (Integrated VoWiFi Client, Separate VoWiFi Client, Browser VoWiFi Client); Device Type (Smartphones, Tablets and Laptops, Others) , and Geography (North America, Europe, Asia Pacific, and South and Central America)