Wifi Carrier Off-load (T-Mobile ? )

Hello, Is there any one here on Nanog list that has experience or information on how to setup T-Mobile Wifi Carrier Off-load ? (Passpoint), for enterprise use ? (I am familiar with and working with Google Orion, I am needing to do the same for T-Mobile) Will greatly appreciate any or all info. Thanks. Faisal Imtiaz Snappy Internet & Telecom