Can someone give advice about all the ways one might programatically push data to a phone that do not involve polling? I am building a phone app where a daemon process will be running to handle various background events (think 'no UI, but stuff going on behind the scenes'). In this application, data needs to be sent to a phone and received by that daemon process. In my research as to how to handle this, I have yet to come up with any reasonable solution that does not involve polling, and does not involve pushing data where the recipient is the actual user (an email, a text message, etc, etc). Thoughts?