Comcast Mobile Broadband???

[Ryan Moats]

Ok, First i was surprised when a rep offered me it, but could this be possible,
the enitire network they have is either 3G or 4G?

Who is their provider/carrier?

http://www.comcast.com/Corporate/Learn/xfinity/4g-3g-wireless-coverage-map.html

 

[Matt Tottle]

According to this: http://finance.yahoo.com/news/Comcast-Launches-XFINITY-prnews-1882561341.html?x=0&.v=1 it's Sprint and Clearwire. But that map is way too full to be just them. So my guess is they use Sprint/Clearwire for their home towers, and have some sort of free roaming agreement with Verizon, similar to what regular Sprint customers have. It's definitely not AT&T because they don't have 3G anywhere outside major cities.

In any case, the 3G is going to be what you get the majority of the time, with 4G in the cities tagged in yellow.

 

[Andrew Herron]

Comcast has a large stake in Clearwire, so does Sprint and a few other companies.