RCS only

if there were it would be in the settings somewhere..down side would be if you dont have a data connection you wouldnt be able to send or receive any texts. if the text failed and normally would flip over to SMS to send it wouldnt be able to do that either...

Thanks.  I've looked at all the settings, and they are not really clear.  I'm not concerned about not being able to fallback to sms, and I understand that iPhone users will not be able to use iMessage to get me.  Don't care.  Am more concerned with security.