A mobile phone, known as a cell phone in North America, is a portable telephone

 that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network.

 Modern mobile telephone services use a cellular network architecture, and, therefore, mobile telephones are called cellular telephones or cell phones, in North America
advanteges:
Paul's passion for technology and digital media goes back over thirty years. Born in the UK, he now lives in Florida, USA.

Mobile phones have radically altered the way that we work, socialize, organize, and play. | Source

Mobile phones (or cell phones as they are often called 

disadvantages

time waste    have negative charge affect the brain    affect on the retina on long use at night

go to wikipedia about mobile

image for cell phone