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There are both prepaid and postpaid cellular service plans. The prepaid cell phone plan is ideal for customers who want a small amount of minutes per month. It is beneficial to know the advantage and disadvantage of prepaid and postpaid plans. The prepaid plan does not have any deposit, monthly rental, termination fee or service fee. But the calls and SMS are more expensive in prepaid plans than in postpaid plans. Normally, users need to pay for both incoming and outgoing calls.

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Currently in the US cellular phones use either analog service or digital service. Most new cellular phones use digital technology. Currently three digital wireless technologies are used in the USA: TDMA (Time Division Multiple Access), CDMA (Code Division Multiple Access), and GSM (Global System for Mobile Communications). Unfortunately, many times digital cellular phones may work with only one technology: TDMA, CDMA, or GSM.