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Worldwide, Samsung's market share drops from 32.5 percent in 2013 to 28 percent in 2014, while competitors, like Apple, maintain or gain ground.
While Samsung says the Note is still important, the marketing for its features is getting lost in the shuffle.
Dan Akerson says Apple would find itself in a highly competitive market with low margins and high costs. He says Apple should stick to iPhones.
The activist investor, who believes Apple shares should be valued at $216, called for Apple to boost its buybacks, using its huge stockpile of cash.
The up-and-coming Chinese smartphone manufacturer has gone from obscurity to China's number-one vendor in just four years. Xiaomi owes a large part of that to its attitude toward customers.
New data from research firm Canalys says that the total PC market, including tablets, fell 6 percent in the fourth quarter but was up 3 percent for all of 2014.
Technically Incorrect: As technology becomes more fixated on fashion, the maker of the iPhone and the Apple Watch is well placed to take advantage.
The leading maker of mobile chips works to quell concerns about its business prospects and new high-end chip after it disclosed this week that a large customer dropped the chip from a major phone.
Most of Apple's record revenue came from its smartphone business, but it's tricky for any company to rely so much on one product.
The maker of Galaxy phones has been struggling to compete with Apple, Xiaomi and others, and 2015 isn't likely to be any easier.