an instant messaging and voiceoverip VioIP app for smart phones
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an instant messaging and voiceoverip VioIP app for smart phones
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Answer:
Viber
Explanation:
Viber Out uses VoIP to establish the connection between the caller and the Viber Out service so that when the call reaches the Viber Out service servers, the servers send the call to the carrier network of the called party.
Check this link for illustration https://www.viber.com/en/blog/2017-11-13/what-is-voip/#:~:text=Viber%20Out%20uses%20VoIP%20to,suit%20any%20user's%20specific%20needs.