T-Mobile announces launch via Twitter
Carriers react to indirect threats to employees -- and their investments
Third-gen Kindle sold millions in fourth quarter, CEO Bezos says
Reports that Apple will add Near Field Communication to iPhones, iPads for mobile payments spurs interest
Lag behind Japan, other countries relates to complexity, analysts say
AT&T's 95.5M subscribers actually compares with Verizon's 102.2M
Still, AT&T sold 4.1 million Apple iPhones in fourth quarter even after it was clear Verizon was coming
Carrier reports best-ever subscriber gains, just before its iPhone exclusive deal ends
ComScore study also finds decline in Web-based e-mail on laptops, desktops
Gartner says downloads will reach 185 billion by end of 2014
