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System and method for prepaid account replenishment |
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Mobility extended telephone application programming interface and method of use |
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2003-04-22 |
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Signaling system and method for network-based pre-paid wireless telephone service |
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Integration of voice and data services provided to a mobile wireless device |
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2001-10-16 |
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Mobility extended telephone application programming interface and method of use |
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Mobility extended telephone application programming interface and method of use |
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