Universal SIM Profile Management for Carrier Switching
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Solution Overview
Problem
Users need to purchase new phones with SIM cards specific to different carriers when switching, as SIM cards are not interchangeable, leading to inconvenience and unnecessary device replacement.
Innovation Solution
A platform that allows users to remotely configure prepaid data plans on their existing SIM cards using a smartphone application or website, enabling access to multiple network operators without replacing the SIM, by securely transmitting and encrypting credentials for reprogramming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If users purchase new phones with SIM cards specific to different carriers when switching, then they can access the desired carrier service, but they incur unnecessary device replacement cost and inconvenience
Solution Approach 1:
The SIM card is transformed into a universal access device that can store and activate multiple carrier profiles (IMSI and Ki pairs) within a single physical card. This allows one SIM card to serve multiple carriers, eliminating the need for separate SIM cards for each carrier and reducing the need to replace the entire phone when switching carriers.
Solution Approach 2:
Multiple carrier identity profiles (IMSI and Ki pairs) are nested within a single SIM card structure. The SIM card can contain several encrypted carrier profiles that can be selectively activated, allowing the user to access multiple carriers without needing multiple separate SIM cards or replacing the phone.
2Reliability
If SIM cards are made non-interchangeable between carriers for security reasons, then carrier security is maintained, but user convenience deteriorates due to inability to switch carriers easily
Solution Approach 1:
A secure cryptographic mechanism acts as an intermediary between the SIM card and multiple carriers. The SIM card stores encrypted carrier profiles (IMSI and Ki pairs) that are secured through cryptographic protection. When switching carriers, the appropriate profile is selectively activated through secure authentication, maintaining carrier security while enabling convenient switching.
Solution Approach 2:
The SIM card's operational parameters (active carrier profile) can be changed remotely and securely without altering the physical SIM card or requiring user intervention. The system dynamically switches between different carrier profiles by changing the active IMSI and Ki pair parameters, enabling convenient carrier switching while maintaining security through encrypted profile storage.
3Manufacturing precision
If users need to buy a new phone with a new SIM for each carrier, then they ensure proper SIM-carrier matching, but they experience loss of time and resources
Solution Approach 1:
Multiple carrier profiles (IMSI and Ki pairs) are pre-loaded and encrypted within the SIM card during manufacturing or initial provisioning. This preliminary preparation allows the user to quickly switch between carriers by simply activating the appropriate pre-stored profile, eliminating the need to purchase and install new SIM cards or phones when switching carriers.
Solution Approach 2:
Multiple carrier identity profiles are copied into a single SIM card in encrypted form. Instead of requiring separate physical SIM cards for each carrier, the system creates cryptographic copies of carrier identities (IMSI and Ki pairs) that can be selectively activated, ensuring proper SIM-carrier compatibility while eliminating the need for physical SIM replacement.
Data Source
AI summary
A method for providing an online market place for purchasing service from a variety of servers is provided. A GUI or application having a page having a list of carriers for the user to select is sent to a mobile device. A selection of a carrier is received. In response, an encrypted IMSI and Ki are sent to the mobile device. The GUI or application may include other pages for the user to manage service.