What is (PoC) Push-To-Talk Over Cellular

Push-To-Talk over Cellular (PoC) enables real-time communication to individuals or groups.

This brings walkie-talkie style communication to your mobile and cell phones; you can then enable a group phone conference or individual talk session.
Your contact list would be enhanced with information about the availability of each contact just like on computer programs like Skype, windows messenger etc. Calls can be made with just a push of a key and you can combine this with instant messaging or text services to communicate with text during your PoC session.
Will this new communication be the next big thing on phones? Will it fade out as fast as it starts? Share your views.

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