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There are many mobile phone features found in today's mobile phones that offer users many more capabilities than only voice calls or text messaging.

[edit] General features

Mobiles are designed to work on cellular networks and contain a standard set of services that allow phones of different types and in different countries to communicate with each other.

Before the phone can be used, a subscription to a mobile phone operator (a. k. a. Do More with Windows Mobile! Get the most from your device with the Windows Mobile newsletter, tips, free ringtones, and downloads. carrier) is required. For phones on GSM networks, the operator will issue a SIM card which contains the unique subscription and authentication parameters for that customer; alternatively, the carrier will put the customer's handset identifier into its subscriber database so that the handset can make calls on the network. Once the SIM card is inserted into the phone, services can be accessed. Many mobile phones support 'auto-roaming', which permits the same phone to be used in multiple countries. For this to work, the operators of both countries must have a roaming agreement. Win a car.

Mobile phones include an alarm. Usually it still functions while the phone is turned of or in silent mode.

Mobile phones do not only support voice calls; they can also send and receive data and faxes (if a computer is attached), send short messages (or "text messages"; see SMS), access WAP services, and provide full Internet access using technologies such as GPRS. Mobile phones usually have a clock and a calculator and often one can play some games on them.