How can I purchase an Add-on for my Freedom Plan? In this article These are the Add-ons available for the Freedom Plans: You are able to activate the Add-on by dialing *143*1501# for Voice Add-on and *143*1500# for Data Add-on. Related articles Can I buy add-ons while on the Freedom Plan? Freedom Postpaid Plans How do I activate the New Freedom Postpaid Plan? What is my Credit limit? What are the calling rates associated with the Freedom Postpaid plans?