SIM Card Code Number Writing via Original Interface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for writing code number information into a Subscriber Identification Module (SIM) card are complex and often fail due to operator limitations on receiving Over The Air (OTA) short messages, and they require additional interfaces, which increases complexity and reduces success rates.
Innovation Solution
The method involves acquiring code number information and sending it through the original interface in the operating system to the Card Operating System (COS) of the SIM card, using encryption and decryption to ensure correct transmission and storage without modifying the original interface, allowing for successful writing even when the SIM card cannot access the operator's network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional dedicated interface is added for writing code number information, then writing capability is improved, but device complexity increases
Solution Approach 1:
The original interface designed for other information transmission is made multi-functional by enabling it to also transmit code number information. The interface maintains its original protocol and structure while adding the capability to carry code number information through encrypted packaging, eliminating the need for a separate dedicated interface.
Solution Approach 2:
The function of transmitting code number information is merged with the existing original interface. Instead of creating a separate transmission path, the patent combines the code number information transmission function with the existing interface that handles other information, reducing overall system complexity.
2Reliability
If OTA short message method is used, then transmission path is established, but operator limitation reduces success rate
Solution Approach 1:
Encryption technology is introduced as an intermediary mechanism to overcome operator limitations. By packaging code number information within encrypted data structures that mimic legitimate information formats, the transmission bypasses operator restrictions on OTA short message reception while maintaining secure and reliable delivery.
Solution Approach 2:
The transmission parameters are changed by encrypting the code number information and packaging it within the structure of other information. This parameter transformation allows the data to be transmitted through channels that would otherwise be blocked or limited by operator policies.
3Reliability
If original interface is modified to transmit code number information, then transmission capability is improved, but implementation complexity increases
Solution Approach 1:
Instead of modifying the original interface structure, the patent creates a copy or wrapper layer that encapsulates code number information within the existing interface protocol. This copying approach allows the interface to transmit code number information without altering its fundamental structure or implementation.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present disclosure relates to an information writing method and device, and belongs to the technical field of communication. The method includes that: code number information of a Subscriber Identification Module (SIM) card is acquired, the code number information being verification information during access of the SIM card to a network of an operator; the code number information is sent to a Card Operating System (COS) of the SIM card through an original interface in an operating system, the original interface being a communication interface programmed for transmission of other information between the operating system and the COS; and the code number information is written into the SIM card through the COS.