I unsubscribed to my college text alert system a year ago, when I left for medical reasons, but I am starting classes back in August and would like to re-subscribe to that service. I have contacted them and they have tried to do everything to put me back into the system. I can receive the alerts from them to my email but for some reason it still won't send to my iPhone as a text message. Is there anything I need to do to my phone to allow the text messages to start coming back to my phone?