The term mobile phone refers to any type of phone that can be used with wireless Internet and has a number that is usually pre-programmed like a landline telephone number to call home or work. Cell phones, also known as cell phones, personal digital assistants or pagers, and wireless phones, sometimes shortened to just cell, mobile or just mobile phone, can make and receive telephone calls via a wireless signal, usually a radio frequency signal. Most modern cell phones come with a built-in receiver that can receive and dial telephone calls, but many newer cell phones use a SIM card or a card reader that connects to a personal computer. Cell phones can also connect to a wireless network through a wireless card. Older cell phones can use a manual base station, but most modern cell phones come with a USB modem that connects to a wireless network.
Since the dawn of the computer, and before cell phones, people have used a variety of different methods to send and receive signals. This is not the case with mobile phones because they use a different kind of signal, the GSM or Global System for Mobile Communication. GSM uses the same technologies as the Internet; it is easy to send and receives data at an amazing rate and can be carried by virtually anyone. One of the reasons why mobile phones work so well is that cell phone networks utilize GSM technology. There are different types of mobile phone networks such as CDMA, TDMA, FCDMA, and UHF.
Smartphones have come a long way in recent years and there are literally hundreds of thousands of different apps available. Smartphones can take applications that we normally would never think about and turn them into useful tools that make our lives easier. We have all heard the term “app” but what exactly do those things mean? Apps are programs and other software programs that are designed specifically for the iPhone, iPod Touch, or other smartphone device.