SIM porting, or SIM card porting, refers to the process of transferring a mobile phone number and its associated service from one mobile service provider to another. It allows users to retain their existing phone numbers while switching to a different carrier. SIM porting is a common practice when individuals want to change their mobile service provider without changing their phone numbers.

Here’s an overview of the SIM porting process:

1. Initiation: The user expresses the desire to switch to a new mobile service provider while keeping their existing phone number. This may involve visiting the new provider’s store or initiating the process online.

2. Verification: The user is required to provide certain details to verify their identity and ownership of the phone number. This may include personal information, the existing SIM card details, and sometimes a unique code provided by the current service provider.

3. Request Submission: The new service provider submits a request to port the phone number to the Mobile Number Portability (MNP) system. This system facilitates the transfer of the phone number between carriers.

4. Authorization: The current service provider receives the porting request and verifies that the user has the right to port the number. If everything checks out, they authorize the transfer.

5. Notification: The user is informed about the status of the porting process, and they may receive a temporary SIM card from the new provider.

6. Activation: Once the porting process is completed, the user’s phone number is transferred to the new carrier. The new SIM card becomes active, and the user can use their phone with the new service provider.

It’s essential to note that while the phone number is ported, other services tied to the old SIM card, such as contacts and text messages, are not automatically transferred. Users may need to back up their data and transfer it to the new SIM card or device.

SIM porting is regulated and governed by national regulatory authorities to ensure a smooth and secure transition for mobile users. The specific procedures and requirements for SIM porting may vary between countries and mobile service providers.