Dynamic multi imsi with native apn

A system for roaming between cellular carriers, the system comprising of:

• at least one processor configured to execute instructions for:
• obtaining from a Home Public Land Mobile Network (home network) at least one International Mobile Subscriber Identity (IMSI) number;
• generating an identification code and sending it to the home network with an indication of a location of the identification code in a Packet Data Protocol (PDP) of a context request response;
• configuring a User Equipment (UE) with instructions to insert the identification code into a specific mandatory characteristic of the PDP, in a response to a context request received from the home network;
• requesting the home network to mark the UE's PDP, presenting the identification code located in the specific mandatory characteristic of the PDP, to distinguish it from other PDP messages;
• and
• requesting the home network carrier operator to direct incoming roaming data from the UE using a marked UE PDP message to a mediating roaming service server.

A method for roaming between cellular carriers, the method comprising:

• generating an identification code and sending it to a Home Public Land Mobile Network (home network) with an indication of a location of the identification code in a registration request when authenticating a User Equipment (UE)'s SIM card and/or IMSI number;
• configuring the UE with instructions to insert the identification code into a specific mandatory characteristic of the registration request, in a response to a context request received from the home network;
• requesting the home network to mark an UE's IMSI number or SIM card data, in the relevant serving data nodes, presenting the identification code located in the specific mandatory characteristic of the registration request;
• and
• requesting the home network to change the data handling and routing by reflecting the user SIM card profile, data and/or identification, stored in the serving data nodes, in the data gateway nodes, based on the identification code.