The process of transferring contact information to a subscriber identity module (SIM) card on Android devices allows users to store contact details directly on the card itself. This facilitates the retention of contacts when switching devices or operating systems. The SIM card acts as portable storage, enabling contact accessibility across different compatible phones.
The practice of storing contacts on a SIM card offers several advantages, primarily enhanced portability and data security. When changing phones, transferring the SIM card ensures immediate access to stored contact details without requiring cloud synchronization or third-party applications. Historically, this method was prevalent before widespread smartphone adoption and cloud-based services. It remains a valuable backup option or a preferred method for users concerned about privacy and data control.