# US 2019/0246263 A1 · Dynamic multi imsi with native apn > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0246263 A1 - Document ID: US20190246263A1 - Status: Published application - Kind: A1 - Application number: 16/341,938 - Filed: 2017-09-13 - Published: 2019-08-08 - Earliest claimed: 2017-09-13 - Assignees: Roamability Ltd - Applicants: Roamability LTD - Inventors: Eitan KEREN - Web page: https://patentgrep.com/patent/US20190246263A1 ## CPC - H04W 8/10: between location register and external networks - H04W 4/24: Accounting or billing - H04W 8/12: between location registers or mobility servers - H04W 8/26: Network addressing or numbering for mobility support - H04W 76/10: Connection setup - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for roaming between cellular carriers, the method comprising: 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 an UE's identification element, presenting the identification code located in the specific mandatory characteristic of the PDP, to distinguish it from other UEs; and requesting the home network carrier operator to direct incoming roaming data from the UE using a marked UE identification element to a mediating roaming service server. ## Claims ### Claim 1 A method for roaming between cellular carriers, the method comprising: 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 an UE's identification element, presenting the identification code located in the specific mandatory characteristic of the PDP, to distinguish it from other UEs; and requesting the home network carrier operator to direct incoming roaming data from the UE using a marked UE identification element to a mediating roaming service server. ### Claim 2 (depends on 1) The method of claim 1, wherein the identification element is a PDP message. ### Claim 3 (depends on 1) The method of claim 1, wherein the identification element is an IMSI number. ### Claim 4 (depends on 1) The method of claim 1, wherein the mediating roaming service server uses the home network's resources or infrastructure. ### Claim 5 (depends on 2) The method of claim 2, wherein the mediating roaming service server is not registered as a local operator in the home network's country, and does not own, maintain or operate network facilities. ### Claim 6 (depends on 4) The method of claim 4, wherein the mediating roaming service server is registered as a local operator in the home network's country, and own, maintain or operate network facilities ### Claim 7 (depends on 1) The method of claim 1, wherein the IMSI number of the UE is marked by the home network along with or instead of the PDP contest request. ### Claim 8 (depends on 1) The method of claim 1, wherein the mediating roaming service server acts as the operator for the UE. ### Claim 9 (depends on 1) The method of claim 1, wherein the identification code characteristics are charging characteristics. ### Claim 10 (depends on 1) The method of claim 1, wherein the mediating roaming service server generates charging fees for the UE, which are independent from the charging fees created by the home network. ### Claim 11 (depends on 1) The method of claim 1, wherein the roaming transition between cellular carriers is done automatically, without the need for human intervention or change of an Access Pint Name (APN). ### Claim 12 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. ### Claim 13 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. ### Claim 14 (depends on 13) The method of claim 13, wherein the home network is configured to direct incoming roaming data from the UE using a marked UE's IMSI number, marked UE's SIM card or marked UE's serving data nodes to a mediating roaming service server.