The MSO is selling three different data cards and service plans:
* XFINITY Internet 2go Metro (4G) service uses a 4G-only data card.
* XFINITY Internet 2go Nationwide (3G) service uses a 3G-only data card.
* XFINITY Internet 2go Nationwide Preferred (4G/3G) switches between available 4G and 3G networks.
Comcast's 4G service will be provided via the Clearwire (www.clearwire.com) network, and its 3G service will be provided by Sprint's nationwide 3G network.