Hotline1, we'll be glad to help so you can view any existing text message details on your line. Having access to your text message history is always a plus. Please reference the link attached under Question #8 on how to view your existing text history via your online My Verizon account. If you need to view existing text messages on your iPhone, you can simply access the Messages app and view your existing conversations from there. http://spr.ly/6608EgQ4M
Note: iMessages are not visible in your online message details as they don't go through as a standard text SMS/(picture/video message) MMS. iMessage is a service provided by Apple and uses mobile data or Wi-Fi to send/receive. Only text message history to and from non-iPhone devices will be viewable online. Does this help?