$47+ Bn Global Push to Talk (PTT) Market to See Booming Growth of CAGR 8.8% by 2028 | Rising Penetration of Smartphones is Propelling Market Growth | Size & Share, Key Players, Growth Forecast Report 2022-2028 by Vantage Market Research WASHINGTON, Aug. 17, 2022 (GLOBE NEWSWIRE) -- Push-to-talk over cellular is widely used for applications that require wide geographical coverage, such as public safety & security, transportation...