The correct answer to this open question is the following.
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A mobile telephone or cellular telephone (commonly, (1) MOBILE PHONE or cell phone) is a long-range, portable electronic (2) DEVICE used for mobile communication. In addition to the standard voice function of a telephone, current mobile phones can provide many additional (3) SERVICES such as SMS for text (4)MESSAGING, e-mail, packet switching for access to the Internet and MMS for (5) SENDING and receiving photos and (6) VIDEOS.
A mobile phone is more than just a phone for most teenagers: it’s also a (7) MP3 PLAYER and a camera. Text messaging is (8) CHEAPER and more private so they use it a lot more than phoning.
