Cell phones offer the big advantage of mobility. Unlike landline phones, which can only be used in the vicinity of a single physical location, cell phones allow calls to be placed and received from anywhere. Cell phones work by connecting to cellular or satellite networks that can also connect to the PSTN.
In addition, smart cell phones can connect to the Internet and support many other features besides voice communication. You can send and receive pictures, music, video, text messages, and e-mail. You can even surf the Internet using your cell phone.
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| Structure of a cellular network |
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