It uses your gmail to send and receive messages. Forget using the touch keyboard to send messages, simply speak to your device.
To send a message you must select any contact from the contact list. In order to a contact appear in this list it will have to have an email set.
You can select contacts individually or groups from your Google Account.
To send the message you can tap on Record and Send button to record your voice or on Voice Recognition button.
Tags: voice message , voice messaging , voice messages , send voice message , send voice messages with , send voice , sending voice message , how to send voice messages on the 2.0 , group voice message