mobile phone

advantages -
mobile phone lets people communicate easily as it can support many additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video. Most current mobile phones connect to a cellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception is satellite phones).
disadvantages -
Impact of active mobile phone usage
Like all high structures, cellular antenna masts pose a hazard to low flying aircraft. Towers over a certain height or towers that are close to airports or heliports are normally required to have warning lights. There have been reports that warning lights on cellular masts, TV-towers and other high structures can attract and confuse birds. US authorities estimate that millions of birds are killed near communication towers in the country each year.

Impact of disposed phones
There are more than 500 million used mobile phones in the US sitting on shelves or in landfills, and another 125 million will be added to the shelves or landfills this year alone. The problem is growing at a rate of more than two million phones per week, putting tons of toxic waste into landfills daily. Several sites including United States top ranked TradeMyCell.com, ReCellular, and MyGreenElectronics offer to remedy to this situation by buying back and recycling mobile phones from users.