A system and methods for availing services in an international roaming by using proactive commands

A method [300] for availing at least one service by a user equipment [110] while leaving an international roaming, the method [300] comprising:

• transmitting, by the user equipment [110], an attach request to at least one first network in an event the user equipment [110] having a global IMSI leaves the international roaming by entering a first location from a second location, wherein
• the first location is served by at least one first network and the second location is served by the at least one second network;
• receiving, by the user equipment [110], an attach reject in response to the attach request, wherein the attach reject is received from the at least one first network;
• updating, by the user equipment [110], at least one location parameter of the first location at the subscriber identity module [120], wherein
• the subscriber identity module [120] is configured at the user equipment [110], and
• the at least one location parameter has an associated status;
• analysing, by the subscriber identity module [120], the associated status of the at least one location parameter of the first location;
• requesting, by the subscriber identity module [120], to receive at least one network parameter of the at least one first network from the user equipment [110] in an event the associated status of the at least one location parameter corresponds to the attach reject;
• communicating, by the user equipment [110], the at least one network parameter of the at least one first network to the subscriber identity module [120], wherein the at least one network parameter comprises a mobile country code of the first location;
• replacing the global IMSI of the user equipment [110] with a home IMSI, by the subscriber identity module [120], in an event the at least one network parameter corresponds to the first location, wherein the home IMSI corresponds to the first location;
• re-transmitting, by the user equipment [110] having the home IMSI, the attach request to the at least one first network;
• and
• availing, by the user equipment [110], the at least one service while leaving the international roaming in an event the at least one first network accepts the attach request with the home IMSI.

A system [100] for availing at least one service by a user equipment [110]while one of in an international roaming and leaving the international roaming, the system [100] comprising:

• a user equipment [110] configured to:
• transmit an attach request to at least one second network in an event the user equipment [110] having a home IMSI is in the international roaming by entering a second location from a first location, and
• transmit an attach request to at least one first network in an event the user equipment [110] having a global IMSI leaves the international roaming by entering the first location from the second location, wherein
• the first location is served by at least one first network and the second location is served by the at least one second network, and
• the home IMSI corresponds to the first location;
• receive an attach reject event in response to the attach request from one of the at least one first network and the at least one second network;
• update at least one location parameter of one of the first location and the second location at a subscriber identity module [120], wherein
• the subscriber identity module [120] is configured at the user equipment [110], and
• the at least one location parameter has an associated status;
• communicate at least one network parameter of one of the at least one second network and the at least one first network to the subscriber identity module [120], wherein the at least one network parameter of the at least one first network and the at least one second network comprises a mobile country code of the first location and the second location, respectively;
• the subscriber identity module [120] configured to:
• analyse the associated status of the at least one location parameter of one of the first location and the second location;
• request to receive the at least one network parameter of one of the at least one second network and the at least one first network from the user equipment [110] in an event the associated status of the at least one location parameter corresponds to the attach reject;
• replace the home IMSI of the user equipment [110] with the global IMSI in an event the at least one network parameter corresponds to the second location;
• replace the global IMSI of the user equipment [110] with the home IMSI in an event the at least one network parameter corresponds to the first location;
• wherein, the user equipment [110] having one of the home IMSI and the global IMSI is configured to re-transmit the attach request to one of the at least one first network and the at least one second network to avail the at least one service while one of in the international roaming and leaving the international roaming in an event the at least one first network and the at least one second network accepts the home IMSI and the global IMSI, respectively.