T-Mobile Wireless Data Configurator Page

Visit this page – http://tmobileus.wdsglobal.com/phonefirst to install T-Mobile settings (t-zones etc.) on your unlocked phone.

The Motorola SLVR is not one of phones available in their list but I found that settings for RAZR V3 worked just fine with my SLVR. You will recieve an SMS message that will download the settings to your phone.