Grading the top 10 U.S. carriers in Q3 2012

top carriersThe third-quarter reporting period has wrapped up, providing plenty of fodder for discussion regarding which carriers are on the right track and which ones are in danger being run over by the competition. FierceWireless charts the top U.S. wireless carriers in the third quarter of 2012 by subscriber base, according to research firm Strategy Analytics, and includes major metrics--such as churn, ARPU and revenue--for each carrier. Special Report.