To start your free trial go to: http://www.eschat.com/index.php?page=trial SLA's Enterprise Chat (ESChat) is a Real Time Push-to-Talk and Group Text Messaging system that is carrier independent, and features cross carrier communications. ESChat includes a rich feature set supporting the needs of the serious work force. ESChat is a subscription based service. The free version downloaded from the Play store provides a method to create a free 30 day demo account. If you want to create an Enterp