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This is a comparison of the various internal components and features of many smartphones.

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This is a list of best-selling mobile phones. The best-selling mobile devices are the Samsung A50s and Samsung Flip, two bar phones released in 2003 and 2005, respectively. Both have sold over 250 million units. The best-selling touchscreen phones are the Apple iPhone 6 and 6 Plus, both released in 2014. Together, they have sold over 220 million units. The best selling flip phone is the Motorola RAZR V3, released in 2004. It sold over 130 million units. The best-selling slider phone is the Samsung E250, released in 2006. It has sold over 30 million units.

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The following is a comparative list of smartphones belonging to the bq line of devices, using the Android/Ubuntu operating system.

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The following is a comparative list of smartphones belonging to the Google Nexus line of devices, using the Android operating system.

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HTC is the original design manufacturer for many Android and Windows Phone-based smartphones and PDAs. Brands that market or previously marketed HTC-manufactured products include Dell, Fujitsu Siemens, HP/Compaq, i-mate, Krome, O2, Palm, Sharp Corporation, and UTStarcom. HTC also manufactures ultra-mobile PCs, and is also the manufacturer of the Nexus One and Nexus 9, a smartphone and tablet designed and branded by Google, respectively.

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This is a list and comparison of devices designed and marketed by Apple Inc. that run a Unix-like operating system named iOS and iPadOS. The devices include the iPhone, the iPod Touch which, in design, is similar to the iPhone, but has no cellular radio or other cell phone hardware, and the iPad. All three devices function as digital audio and portable media players and Internet clients. The Apple TV, which runs tvOS, is a set-top box for streaming media from local sources and from certain internet services to a connected television set, and has no screen of its own. About 1.35 billion iOS devices have been sold worldwide as of March 2015. As of September 2018, about 2 billion iOS devices have been sold worldwide.

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The following is a comparative list of smartphones belonging to the LG V series range of devices, all using the Android operating system.

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This is a list of mobile phones with open-source operating systems.