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compare phone compare phone malaysia compare phone plans compare phone deals compare phone tariffs compare phone and broadband compare phone specifications The common components found on all phones are: A battery, providing the power source for the phone functions. An input mechanism to allow the user to interact with the phone. The most common input mechanism is a keypad, but touch screens are also found in some high-end smartphones. Basic mobile phone services to allow users to make calls and send text messages. All GSM phones use a SIM card to allow an account to be swapped among devices. Some CDMA devices also have a similar card called a R-UIM.

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