A mobile phone, mobile or cell phone, sometimes shortened to just mobile, phone or hand phone and sometimes also called a mobile phone or portable phone, is usually a small portable phone that will make and receive calls via a radio signal, usually a Global System for Mobile Communication (GSM) signal. It can be used indoors or out, by a person lying in bed, waiting for a train, flying on an airplane, waiting for an answer to a doorbell, and so on. The uses of a mobile phone are as varied as the users themselves, from safety measures for driving a car to making a phone call at home to taking pictures and enjoying music on the go. Because the technology to operate a mobile phone has changed vastly over the years, the basic functionality of the phone remains the same. The keypad, battery, touch screen, speaker, and microphone are all still present and functioning, although some newer phones have cameras and video capabilities as well.

A feature most people think of when they think of mobile phones is the ability to make international mobile phone calls. Most of the larger and more reputable phone companies are licensed to make calls internationally and are therefore able to make calls to any landline or mobile phone. This gives anyone with a Global System for Mobile Communications (GSM) number access to make calls to other people all around the world for as long as they have service and a reliable connection.

As an example, let’s say you were wondering what is the full form of Android. If you type in “what is the full form of android” into Google, you will get several different results, each with their own definition of what the full form of Android is. You may see that some websites say that Android is a software program while others call it an operating system. Other websites will tell you it is a distribution platform while others will claim it is a manufacturer’s product.