Can you show me proof of these standards from the FCC supporting your claim? I am not saying that you are not right, but I want to see proof. Perhaps this 50%= national carrier is something that has changed, that no one else knows. Because all I see is statements like this:

"U.S. Cellular, a regional carrier serving just 26 states mostly in the South and Midwest..."

"U.S. Cellular, a regional carrier that provides service in 26 states..."

"U.S. Cellular’s roadmap for the rest of the year has been revealed in all its glory, and for a little regional carrier, they’ve got some solid hardware on the way...."

"Regional carrier U.S. Cellular today announced availability of the HTC 7 Pro, the carrier's first Windows Phone 7 (WP7) device..."

http://www.nationalledger.com/lifestyle-home-family/ ... »

http://billionaires.forbes.com/quote/01CM2C2c08bTm »

http://www.intomobile.com/2011/07/14/u-s-cellular-ro ... »

http://www.wirelessweek.com/News/2011/06/Devices-US- ... »

I have seen no one, other than US Cellular's advertisements, that refer to it as a national carrier, and can not find this FCC standard that you say exists.