eSIM Configuration Download Through SIM Network Without Wi-Fi

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Solution Overview

Problem

Mobile terminals without support for Wi-Fi or Bluetooth communication technologies face difficulties in efficiently and quickly downloading configuration files for eSIM cards, leading to a poor user experience.

Innovation Solution

Utilizing a SIM card's communication network to send a configuration file download instruction to a server when the eSIM card is not activated, and writing the target configuration file received from the server into the eSIM card to activate it.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If mobile terminals use Wi-Fi or Bluetooth communication to download eSIM configuration files, then the download speed and efficiency are improved, but the device complexity increases due to requiring additional communication modules

Engineering Contradiction:
Improveconfiguration file download efficiencyVSAvoidcommunication module complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The SIM card's communication interface is made multi-functional: it serves both traditional SIM card communication purposes and eSIM configuration file download purposes. This eliminates the need for separate Wi-Fi or Bluetooth modules specifically for eSIM configuration, as the existing SIM card communication infrastructure is leveraged to achieve efficient configuration file downloads.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If mobile terminals without Wi-Fi or Bluetooth support attempt to download eSIM configuration files, then the device complexity remains low, but the download capability is lost resulting in poor user experience

Engineering Contradiction:
ImproveeSIM activation convenienceVSAvoidconfiguration file download capability
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The SIM card's communication network is utilized to enable the terminal to autonomously download eSIM configuration files without requiring external Wi-Fi or Bluetooth infrastructure. The system uses the already-present SIM card communication capabilities to service the eSIM configuration need, making the download process self-sufficient and eliminating dependency on additional communication technologies.

Inventive Principle:
Principle #25Self-service

3Device complexity

If the eSIM card is activated before downloading the configuration file, then the system simplicity is maintained, but the activation fails because the configuration file is missing

Engineering Contradiction:
Improveactivation process complexityVSAvoideSIM activation success rate
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The system performs preliminary actions by automatically initiating the configuration file download process before completing the eSIM activation. The method detects when an eSIM card is inserted and automatically uses the SIM card's communication network to download the necessary configuration file first, ensuring the eSIM is fully prepared and configured before activation occurs, thereby preventing activation failures.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20250338111A1Configuration File Downloading Method, Terminal and Storage Medium
Publication Date: 2025.10.30 ZTE CORP
  • US20250338111A1 patent drawing
  • US20250338111A1 patent drawing
  • US20250338111A1 patent drawing

AI summary

The embodiments of the present disclosure belong to the field of communications. Provided are a configuration file downloading method, a terminal, and a storage medium. The method comprises: after a mobile terminal is powered on, in the case where an eSIM card is not activated and a SIM card has been inserted, using a communication network of the SIM card to send a configuration file download instruction of the eSIM card to a server, wherein the SIM card is used for providing a communication network; and acquiring a target configuration file returned by the server based on the configuration file download instruction, and writing the target configuration file into the eSIM card to activate the eSIM card.