Abstract: According to a first aspect of the invention there is provided a method of providing a multi-IMSI solution for a subscriber having a mobile device in an operating mobile network, the mobile device being fitted with a SIM card having an IMSI and a baseband component, the mobile device comprising a corresponding baseband processor to enable the SIM card to communicate with a home network, run by a home network operator, related to the IMSI via the baseband processor. The method comprises fitting a SIM card overlay to the SIM card, the overlay acting as a proxy between the SIM card and the mobile device's baseband processor, the overlay comprising a primary (“pilot”) sponsor IMSI that is related to a sponsor network, run by a sponsor network operator, with a temporary activation Ki, determining when the mobile device has roamed out of the home network and into a foreign network having an agreement with a sponsor network associated with the sponsor IMSI.

Abstract: A method of authenticating a mobile station on an alternate communications network is disclosed, the mobile station being associated with a default communications network. The mobile station comprises a baseband processor to manage the antenna-related functions and a SIM card to accommodate a default SIM associated with the default communications network for receiving network credentials from the baseband processor.

Abstract: A method of authenticating a mobile station on an alternate communications network is disclosed, the mobile station being associated with a default communications network. The mobile station comprises a baseband processor to manage the antenna-related functions and a SIM card to accommodate a default SIM associated with the default communications network for receiving network credentials from the baseband processor.

Abstract: A method of authenticating a mobile station on an alternate communications network is disclosed, the mobile station being associated with a default communications network. The mobile station comprises a baseband processor to manage the antenna-related functions and a SIM card to accommodate a default SIM associated with the default communications network for receiving network credentials from the baseband processor.

Abstract: According to a first aspect of the invention there is provided a method of providing a multi-IMSI solution for a subscriber having a mobile device in an operating mobile network, the mobile device being fitted with a SIM card having an IMSI and a baseband component, the mobile device comprising a corresponding baseband processor to enable the SIM card to communicate with a home network, run by a home network operator, related to the IMSI via the baseband processor. The method comprises fitting a SIM card overlay to the SIM card, the overlay acting as a proxy between the SIM card and the mobile device's baseband processor, the overlay comprising a primary (“pilot”) sponsor IMSI that is related to a sponsor network, run by a sponsor network operator, with a temporary activation Ki, determining when the mobile device has roamed out of the home network and into a foreign network having an agreement with a sponsor network associated with the sponsor IMSI.

Abstract: A SIM card applicator to enable a communications processing overlay to be attached to a SIM card is provided, the SIM card comprising a plurality of SIM card pads. The overlay comprises a communications processing portion and overlay pads that allow for the communications processing portion to send/receive information to/from the SIM card, once attached. The applicator comprises a holder to releasably hold the overlay in place; and a SIM receiving body to receive the SIM card, the holder and the SIM receiving body being arranged to correctly align and secure the communications processing portion of the overlay and the SIM card pads of the SIM card, wherein the overlay can be removed or separated from the holder, thereby resulting in the communications processing portion of the overlay being correctly aligned and secured to the SIM card pads, so as to define a modified SIM card for use in a mobile device.

Abstract: A method of authenticating a mobile station on an alternate communications network is disclosed, the mobile station being associated with a default communications network. The mobile station comprises a baseband processor to manage the antenna-related functions and a SIM card to accommodate a default SIM associated with the default communications network for receiving network credentials from the baseband processor.