Tech Five: Samsung names new head of mobile

As smartphone sales slide, Samsung is making a shift in management for its mobile phone unit.

Here are the tech stocks to watch Tuesday:

Samsung. Koh Dong Jin will become Samsung's new president of mobile communications, reports Bloomberg. He previously worked on the mobile payment service Samsung Pay and security service Knox. Former mobile head Shin Jong Kyun will stay on as president and co-CEO of the electronics business.

Amazon. The online retailing giant says it sold three times more Fire tablets during the Black Friday weekend compared to last year. In a statement released Tuesday, Amazon says its voice-enabled speaker Echo was the top-selling device priced over $100.

Apple. Might the next iPhone drop the headphone jack? A new report suggests Apple's quest for an even thinner smartphone includes dropping a traditional headphone jack, allowing users to plug headphones through the device's lightning connector.

AT&T. Starting in February, the wireless carrier will raise the price of grandfathered unlimited plans. According to 9to5Mac, users who held on to unlimited plans will have to pay an extra $5 a month.

Adobe. The software maker launched its first video editor for Android. The Verge reports Premiere Clip -- also available on Apple's iOS platform -- is a simple editor that lets users create and manipulate clips, and add music.

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