Verizon has began offering a push-to-talk app and service for BlackBerry handset owners. As with other push-to-talk systems, users can contact team members or clients by pressing a single button, place group calls with up to 50 participants and check which team members are available thanks to a Presence feature. Verizon's system works over the regular cell network and not iDEN, as on Sprint....
Source : http://www.electronista.com/articles/10/03/19/veri...
Source : http://www.electronista.com/articles/10/03/19/veri...