Abstract: Disclosed is a method for managing the use by a wireless communications unit including a SIM card of wireless communications routed via a gateway node, a charging server and a BSS, which gateway node categorizes communication services into a set of access types. The BSS provides a digital communications interface, accepting requests from third parties regarding the access to services of specific types to the user, a session is initiated between the unit and the gateway, pertaining to a certain access type, the gateway queries the charging server and the BSS regarding the availability of the certain access type, the BSS provides to the charging server and the gateway such information based upon the requests, the gateway provides access to the service, and the gateway provides information to the charging server and the BSS regarding service usage.

Abstract: Method for routing mobile phone signaling messages between different collaborating networks (20,30) including an STP (25,35) and at least two home networks (10,40) including an STP (16,36). A collaborating ITP (29,39) is connected to a collaborating STP (25,35), a home ITP (17,47) is connected to a home STP (16,46), and a central ITP (51) is connected to each ITP via a wide area network (6) which is not a PSTN. A visited country IMSI identifies a mobile subscriber as a subscriber to a collaborating network. A visited IMSI is associated with a home network in the central ITP. A signaling message, including the visited IMSI, is sent from a collaborating STP to the collaborating ITP, and is forwarded to the central ITP. The message is forwarded from the central ITP to a home ITP with which the visited IMSI is associated, and sent to the corresponding home STP.

Abstract: A method for use when a mobile communication device roams between a home network and foreign networks, which device includes a SIM card using an IMSI, includes the steps of storing on the SIM card a first IMSI for network identification; upon receipt of a location update message indicating that the mobile device has moved to a first visited network, firstly causing the HLR to send an instruction message to the mobile device to change, to a second IMSI, the IMSI used for network identification; secondly causing the mobile device to use the second IMSI for network identification and saving the first IMSI; and then causing the mobile device to perform a device network refresh; and upon roaming back to the home network, causing the mobile device to change the IMSI used for network identification back to the first IMSI and then to update its network status.

Abstract: Method and system for use when a mobile communication device (40) roams between a mobile communication home network (10) and one or several mobile communication networks (20,26,30,36), which device includes a SIM card (41), the method includes the steps of: a) the device roaming in a first collaborating network (20); b) the home network allowing the device Internet access to a predetermined Internet address but not general Internet access; c) the device contacting the predetermined Internet address and the user providing login credentials; d) associating an IMSI and/or an MSISDN of the SIM card with a user account identified by the login credentials; e) allowing Internet access to the device in accordance with an agreement tied to the user account.

Abstract: A method when roaming by a mobile communication device including a SIM card identifying itself using an IMSI roams between a home network and one or several visited networks, which networks are interconnected by a PSTN. The method a) stores on the SIM card a first IMSI associated with a first collaborating network; b) initiates a location update procedure using the first IMSI; c) triggered by the location update procedure and based on the first IMSI, causes an STP (Signal Transfer Point) of the first collaborating network to send a location update message to an ITP (Internet Transfer Point); and d) causes the first ITP to forward the message to an STP of the home network via a wide area network and not using the PSTN.