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T-Mobile's customer base surpassed the 50 million mark as aggressive promotions once again stoked growth. Its profit was helped by a gain from a spectrum licensing deal.
The bookseller's devices and e-books business blames "lower average selling prices and lower device unit sales" for a more than 32 percent decrease in revenue during its fiscal second quarter.
The company adds 1.15 million new tablets in the period, offsetting a slowdown in smartphone growth.
The carrier added 2.4 million wireless customers, the first time it's topped the 2 million mark. But growth didn't come cheap.
The carrier, meanwhile, says it's brought LTE to 41 more cities, and its Sprint Spark enhanced network to another six cities, as it trudges through its painful network upgrade.
Verizon was aided by the rising profits from Verizon Wireless, which it took full control of in February, but customer growth slowed.
The No. 4 wireless carrier adds 579,000 customers in the first quarter while notching its lowest churn rate in nearly five years.
Sprint has its hopes pinned on its friends and family plan as the rest of the wireless carriers pile up on incentives to switch.
In an interview with CNET, the executives dish on their ETF buyout plan and the push for faster WideBand LTE, and they continue to dump on Sprint.