Multi-SIM Identity Management via CLIR Call Transfer

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Solution Overview

Problem

Current multi-SIM phone designs often force users to reveal their secondary SIM contact number to individuals from different groups when network coverage or service issues necessitate switching between SIMs, leading to unintended contact exposure.

Innovation Solution

Implementing a method that initiates calls using the secondary SIM while invoking the Calling Line Identification Restriction (CLIR) supplementary service to prevent the display of the secondary SIM's calling line identity, ensuring only the primary SIM's identity is revealed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the user switches to a secondary SIM for calls due to network coverage or service issues, then call connectivity is maintained, but the secondary SIM's identity is exposed to contacts from different groups

Engineering Contradiction:

Improvecall connectivityVSAvoidcontact privacy

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent introduces a call transfer mechanism as an intermediary process. When switching SIMs, the system automatically transfers the call through network infrastructure rather than directly exposing the secondary SIM identity to the contact. This mediator layer allows connectivity while protecting the user's contact privacy by not revealing which SIM is actually being used.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the user uses a secondary SIM to contact someone from the primary SIM's group, then communication flexibility is improved, but contact exposure occurs

Engineering Contradiction:

Improvecommunication flexibilityVSAvoidcontact privacy

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The automatic call transfer feature acts as an intermediary that enables the user to maintain communication flexibility with contacts from any group while preventing direct exposure of the secondary SIM identity. The system handles the SIM switching transparently through the network, so the contact only sees the primary SIM identity regardless of which SIM is actually used for the call.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9877184B2Method of managing multiple subscription and user identities in multi-SIM user devices

Publication Date: 2018.01.23 SAMSUNG ELECTRONICS CO LTD

AI summary

Apparatuses, systems, and methods to avoid contact/identity disclosure when using a multiple subscriber identity module (multi-SIM) wireless electronic device are described. According to one method, if a call to a first party in a first SIM cannot be established using the first SIM, the call is established using a second SIM, but without the device displaying identity/contact information of the first SIM. According to the embodiment, the calling line identification restriction (CLIR) supplementary service may be used, a user-to-user signalling (UUS) service may be invoked, and/or the user may decide to share selected identity/contact information associated with the first SIM while withholding the rest from the device.