Can I change my calling card without changing my number?

1, can I change my mobile phone without changing the number? It's possible.

2. The term of telephone number is MSISDN, and the term of mobile phone card is SIM card. The IMSI number is burned in the SIM card, which is unique in the whole network and the whole world.

3. The operator establishes the corresponding relationship in his own communication system. On the surface, we dial the MSISDN number. In fact, in the mobile system, we use the IMSI number to find each other, but these are all transparent to users.

4. So, your idea is completely realizable. Suppose your mobile phone card is lost. All you have to do is take your ID card to the business hall and buy a new card directly. If you come in time, you won't spend less.

Extended data:

Common faults

1. Whenever the mobile phone is turned on, it must communicate with the SIM card. These signals will not be sent when the card is not inserted. When the mobile phone does not respond after inserting the SIM card or the SIM card is displayed incorrectly, it may be caused by poor switch or poor contact of the SIM card or the use of waste cards.

2. If the fault still exists after replacing the new card, then the fault generally appears in the power part of the SIM card. At the power end, clock end and data end of the SIM card socket, you can observe the card reading signal at the instant of starting with an oscilloscope. If there is no such signal, the resistance and capacitance elements around the power switch of the SIM card should be welded with the card.

3. If the SIM card is available on one mobile phone but not on another, it may be that the functions of "network restriction" and "user restriction" are set in the mobile phone. This can start the restriction function of mobile phone through 16 bit network control code (NCK) or user control code (SPCK), which needs to be solved by network operators.

Baidu Encyclopedia: Mobile Phone Card