Nowadays most smartphones allow two physical SIM cards or multiple eSIM profiles. This is already a common knowledge and use. Imagine a user with two physical SIM cards or two eSIM profiles, all being active and supplied from two different operators within the country. Once again, common practice. But the user wants to exchange MSISDNs between SIM/eSIMs at the same time retaining both SIM/eSIM to remain active after the process. And there is a Recipient Led Number Portability system/process in place.

Should such a user visit both operators as Recipients for the respective port? Who can guarantee that both ports will take place at the same time with the current NP system and processes? But still, you do not want to change the existing NP environment? We have the answer.

Since simultaneous two-way porting, called a swap, cannot be initiated by a single operator, the eSIM swap portability system with Web GUI should be controlled by a trusted and independent industry stakeholder with authority, a National Regulatory Authority (NRA). A user who wants to swap MSISDNs between two active eSIM profiles or SIM cards enters ICCID for eSIM or IMSI for SIM, both MSISDNs, places a flash call to the instructed national delegated number, and confirms their understanding with GTC. And that’s it. No need to enter user data or anything else, as both subscriptions are active and will remain active after MSISDNs swap porting. The system verifies subscriptions being active with flash calls CLIs, confirming that neither subscription is barred from outgoing service - the first user-facing step of the collection process.
The eSIM swap system core then communicates with existing NP systems during the number portability execution phase, sending activation requests to both recipients simultaneously. Donors cannot reject the porting since both subscriptions are active and will remain active.
Since two-way porting can only be initiated by the user (not by two different service providers acting as recipients simultaneously), the same system also enables anonymous user porting, common in many jurisdictions for anonymous prepaid services. These users purchase new prepaid cards anonymously at retail, use the system to swap MSISDNs, and simply stop using their old cards.

• Privacy-First Architecture: Uses tokenisation to protect sensitive user data from unnecessary disclosure during the porting process.

• Secure Identity Verification: Authenticates users through secure channels without sharing full PII (Personally Identifiable Information) with donor providers.

• Data Minimisation: Ensures only the technical data required for a successful switch is exchanged between parties.

• Compliance by Design: Built to align with global data protection standards, such as GDPR, specifically for the utility and telco sectors.

• Simultaneous Dual-Porting: Enables the instant exchange of two numbers across devices in one transaction, eliminating the "wait-and-sync" period.

• User-Triggered Execution: Removes the SP middleman; users trigger the swap via API, drastically reducing customer support call volumes.

• Near-Zero Latency: Bypasses traditional 24-hour porting windows, delivering the instant gratification today's digital-first consumers demand.

• Automated Authentication: Securely validates both sides of the swap instantly, ensuring zero service downtime during the transition.

The Blocked Number Registry (BNR) is a specialised solution designed to revolutionise the number porting landscape by shifting control from individual service providers to independent regulatory bodies.
By maintaining a centralised, authoritative list of numbers restricted due to theft, loss, or legal mandates, BNR removes the administrative friction that often plagues the switching process. 

The system may also include an intuitive Flash call IVR verification tool and a web-based GUI, enabling a "Gaining/Recipient Provider Led" approach where citizens can initiate and validate their active accounts for porting requests seamlessly and without unnecessary donor-side delays. With BNR, National Regulatory Authorities can foster a more competitive, transparent, and consumer-centric telecommunications market.

• Automated Eligibility Checks: Instantly verifies number eligibility to prevent arbitrary porting rejections.

• Gatekeeping Bypass: Automates the approval process to prevent donor providers from using anti-competitive delay tactics.

• Centralised Database: Serves as a single source of truth for all market participants to verify the status of restricted, blocked, stolen, lost, or in-collection numbers.

• Audit-ability: Tracks rejection trends and donor behaviour, giving regulators the data needed to enforce fair competition.

• External registry system integration: Supports integration with external systems such as biometric databases, national personal registries, and court registries.

• When integrated with the Flash call IVR system, all general rejection reasons are validated before the process begins on the Donor side

A zero-cost gateway to customer freedom, ensuring every citizen can navigate their switching journey without barriers or bills.

What is needed? NRA specifies national delegated phone number (geographic or non-geographic, either mobile or fixed) or a block of them (if number of expected simultaneous calls exceed pre-configured capacity for round-robing algorithm for number delegation) demanding all Service Providers not to block CLI for originating calls to delegated number(s). Service Providers forward calls to delegated number(s) to defined the SIP end point. Delegated number(s) do not need to be considered as free-tool number(s) to allow prepaid calls only for users with enough balance on their account, since Flash call deliver the IVR message as a ring-back tone, ensuring no charges are applied to the end user.

Flash call IVR system also incorporates control for possible call spamming (too many calls originating from same A number in a predefined period of time), where A number masking within the same Country Code will only limit the end user from processing its request. Calls from a different Country Code to delegated numbers will be rejected.

After receiving a call, the Flash call IVR system sends simplified CDRs with essential information to the switching and porting clearing house via RESTful API for further analytics and process decisions.

• Toll-Free Accessibility: Allows users to initiate switching and porting requests at no cost to the caller. Connected with Block number registry minimising or eliminating need for Donor switching&porting eligibility check - reducing or eliminating rejected switching&porting requests.

• Supporting human or machine interrogation: for human generated calls confirmation is provided as ring-back tone. For machine generated calls SIP Identity management with CLI provides sufficient and secure validation information.

• Multilingual Support: Offers a customisable voice interface to serve diverse national populations.