A method for facilitating collection and display of information related to data usage by a plurality of mobile devices is disclosed. The method involves receiving first quantity information and sending a first identifier associated with the plurality of mobile devices and first activity-related information including the first quantity information to a server. The method also involves receiving group activity-related information associated with the plurality of mobile devices, the group activity-related information derived at least in part from second activity-related information including second quantity information, and producing signals for causing a display to display information derived from the group activity-related information. A method of associating a plurality of mobile devices in a group is also disclosed. Systems and computer-readable media for facilitating collection and display of information related to data usage by a plurality of mobile devices and for associating a plurality of mobile devices in a group are also disclosed.

A mobile device is provided. The mobile device includes a memory configured to store a plurality of applications, a communication circuit including a first communication module and a second communication module, and a processor electrically connected with the communication circuit. The processor is configured to execute an application among the plurality of applications, determine a communication state of the first network and a communication state of the second network in response to executing the application, select one of the first network and the second network based on the communication state of the first network, the communication state of the second network, a tariff applied to the mobile device, a service policy applied to the application, performance criteria applied to the application, and network selection criteria, and download data from a server associated with the application using the selected network.

A mobile device is provided. The mobile device includes a memory configured to store a plurality of applications, a communication circuit including a first communication module and a second communication module, and a processor electrically connected with the communication circuit. The processor is configured to execute an application among the plurality of applications, determine a communication state of the first network and a communication state of the second network in response to executing the application, select one of the first network and the second network based on the communication state of the first network, the communication state of the second network, a tariff applied to the mobile device, a service policy applied to the application, performance criteria applied to the application, and network selection criteria, and download data from a server associated with the application using the selected network.

A charge management system includes a user managing unit configured to manage pieces of user identification information for identifying users and pieces of terminal identification information for identifying transmission terminals, each piece of user identification information being associated with pieces of terminal identification information for identifying transmission terminals used by a user identified by the each piece of identification information; and a calculating unit configured to calculate a participation charge to each of the transmission terminals, bases on a total participation duration in which the each of the transmission terminals has participated in a conversation during a predetermined period, and calculate a total participation charge to each of the users by summing up the participation charges to transmission terminals specified by the pieces of terminal identification information associated with the each piece of the user identification information.

A charge management system includes a user managing unit configured to manage pieces of user identification information for identifying users and pieces of terminal identification information for identifying transmission terminals, each piece of user identification information being associated with pieces of terminal identification information for identifying transmission terminals used by a user identified by the each piece of identification information; and a calculating unit configured to calculate a participation charge to each of the transmission terminals, bases on a total participation duration in which the each of the transmission terminals has participated in a conversation during a predetermined period, and calculate a total participation charge to each of the users by summing up the participation charges to transmission terminals specified by the pieces of terminal identification information associated with the each piece of the user identification information.

Asynchronous and/or synchronous telephony protocol systems and methods may include an asynchronous signaling node (ASN) and/or a call duration time quota from a charging onset to place and complete a call based on a first device call request as received from a first user mobile device on a packet switched network. The asynchronous systems include instructions to automatically modify the telephony address with a prefix and destination address when the first device has insufficient or independent balance or upon a network exception; route the modified call signal to the ASN; and deliver and automatically disconnect the call when the call is completed. The synchronous systems are balance-independent and include instructions to automatically set the call duration time quota upon such exception, and deliver and automatically disconnect the call from the second user telephony device when the call is completed or when the call duration time quota is exceeded.

Asynchronous and/or synchronous telephony protocol systems and methods may include an asynchronous signaling node (ASN) and/or a call duration time quota from a charging onset to place and complete a call based on a first device call request as received from a first user mobile device on a packet switched network. The asynchronous systems include instructions to automatically modify the telephony address with a prefix and destination address when the first device has insufficient or independent balance or upon a network exception; route the modified call signal to the ASN; and deliver and automatically disconnect the call when the call is completed. The synchronous systems are balance-independent and include instructions to automatically set the call duration time quota upon such exception, and deliver and automatically disconnect the call from the second user telephony device when the call is completed or when the call duration time quota is exceeded.

Systems, devices, and techniques are provided for incoming call rate selection. A communications device may receive an incoming call associated with an incoming calling entity identifier. An interface may display the incoming calling entity identifier and a rate selection control including a control for changing the rate of the incoming call. A selection by the user of the control for changing the rate of the incoming call may be received. The interface may display rate entry controls including a control for receiving input of a rate change for the incoming call. Input of the rate change for the incoming call may be received through the interface. The rate change may include one or both of a changed rate and a surcharge. The rate change for the incoming call may be transmitted to at least one carrier system responsible for routing the incoming call. The incoming call may be accepted.

Systems, devices, and techniques are provided for incoming call rate selection. A communications device may receive an incoming call associated with an incoming calling entity identifier. An interface may display the incoming calling entity identifier and a rate selection control including a control for changing the rate of the incoming call. A selection by the user of the control for changing the rate of the incoming call may be received. The interface may display rate entry controls including a control for receiving input of a rate change for the incoming call. Input of the rate change for the incoming call may be received through the interface. The rate change may include one or both of a changed rate and a surcharge. The rate change for the incoming call may be transmitted to at least one carrier system responsible for routing the incoming call. The incoming call may be accepted.

Asynchronous and/or synchronous telephony protocol systems and methods may include an asynchronous signaling node (ASN) and/or a call duration time quota from a charging onset to place and complete a call based on a first device call request as received from a first user mobile device on a packet switched network. The asynchronous systems include instructions to automatically modify the telephony address with a prefix and destination address when the first device has insufficient or independent balance or upon a network exception; route the modified call signal to the ASN; and deliver and automatically disconnect the call when the call is completed. The synchronous systems are balance-independent and include instructions to automatically set the call duration time quota upon such exception, and deliver and automatically disconnect the call from the second user telephony device when the call is completed or when the call duration time quota is exceeded.