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That first cell phone began a fundamental technology and communications market shift to making phone calls to a person instead of to a place. [6] [19] Bell Labs had introduced the idea of cellular communications in 1947, but their first systems were limited to car phones which required roughly 30 pounds (12 kg) of equipment in the trunk. [21]
Mobile phone chargers have gone through a diverse evolution that has included cradles, plug-in cords and obscure connectors. However, devices built between 2010 and 2020 generally use micro-USB connectors, while newer devices tend to use USB-C.
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The original Motorola Bag Phone has been succeeded by the Motorola M800 and M900 Bag Phones, introduced in 2005. While they are technologically dissimilar to the original Bag Phones and use an entirely different user interface, the M800 and M900 support CDMA and GSM, respectively, and add the basic features of modern cell phones.
Situation is however worse in CDMA-based systems like IS-95, where Qualcomm is the major IP holder. [citation needed] GSM has a fixed maximum cell site range of 120 km, [5] which is imposed by technical limitations. [6] This is expanded from the old limit of 35 km.
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3579 S High St, Columbus, OH · Directions · (614) 409-0683