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US2017329615A1
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Interactive Time Delayed Transactions
|
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WO2018150229A1
|
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Late stage revenue assurance in prepaid telephony
|
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US2017237822A1
|
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Third Party Sponsored Short Messaging Service
|
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US2017078494A1
|
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Late stage call setup management in prepaid telephony
|
|
US2012083243A1
|
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Communication Network Signaling
|
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US2011243069A1
|
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Automatic Disconnect in Ringing State of Call from User with No Credit
|
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BR112012003376A2
|
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methods and systems for billing communication.
|
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EP2039176A1
|
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Voiding calls to signal supplementary services
|
|
BRPI0412361A
|
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services and transactions over a telephone network
|
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WO2004110089A1
|
|
Use of sim cards in different networks
|
|
EP1942647A2
|
|
Third party call establishment
|
|
WO2004100520A1
|
|
Method of transferring airtime in a telephony network
|
|
US2008139170A1
|
|
Call management protocol for insufficient credit
|
|
WO2004100575A2
|
|
Call management protocol with nominated caller group
|
|
WO2004098211A1
|
|
Method of operating a telephony network
|
|
WO2004093426A1
|
|
Method and system for reverse-charge calling
|
|
WO2004089642A2
|
|
Tamper proof cheque
|
|
WO2004089025A1
|
|
Terminal independent personal telephone services
|
|
WO2004068833A1
|
|
Method and system for reverse-charge calling
|
|
WO0159582A2
|
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A method of displaying tasks to be performed
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