Follow this help article on T-Mobile's site http://support.t-mobile.com/docs/DOC-2383 T-Mobile has easy-to-follow directions this page. Follow this help article on T-Mobile's site http://support.t-mobile.com/docs/DOC-2383 http://support.t-mobile.com/docs/DOC-2383 https://support.t-mobile.com/docs/DOC-2383 http://support.t-mobile.com/docs/DOC-2383 http://support.t-mobile.com/docs/DOC-2383 http://support.t-mobile.com/docs/DOC-2383