Methods, systems and devices for dynamic HPLMN configuration

摘要

Methods, devices and systems enable the dynamic updating of home public land mobile network (HPLMN) information stored on a subscriber identification module (SIM) to avoid a roaming indication, without requiring any modifications to the mobile device modem, SIM application programming interface (API), the modem software, or the mobile device operating system. A mobile device may scan available public land mobile networks (PLMNs) to identify a participating PLMN to which the mobile device may connect, and receive network values having a mobile country code (MCC) value and a mobile network code (MNC) value from the identified PLMN. The mobile device may overwrite an existing HPLMN value and/or one or more IMSI values on the SIM with the receive network values.

主权项

1. A method for dynamically updating a home public land mobile network (HPLMN) value on a subscriber identification module (SIM) of a mobile device, comprising:
by the mobile device, identifying an available public land mobile network (PLMN) to which the mobile device may connect; by the mobile device, receiving network values from the identified PLMN network, the received network values including a mobile country code value and a mobile network code value; by the mobile device, determining whether the received network values match the existing HPLMN value on the SIM; and by the mobile device, overwriting an existing HPLMN value on the SIM with a new HPLMN value that includes the received mobile country code value and the received mobile network code value in response to determining that the received network values do not match the existing HPLMN value on the SIM, wherein overwriting an HPLMN value on the SIM with a new HPLMN value that includes the received mobile country code value and the received mobile network code value comprises:
performing a memory write operation on the SIM via an application programming interface (API).