Shulou(Shulou.com)05/31 Report--

Audio commentary

Hello, everyone. The meeting will answer your questions. Why does the Wechat itinerary card display abnormal data? does the calling card show when you take down the itinerary card? many people don't know this yet. Now let's take a look at it.

Answer:

1. As long as the phone is turned off or the phone card is unplugged, the phone cannot communicate with the base station, and the base station cannot know the location of the phone. When the phone is turned on, you must shake hands with the base station to confirm your identity. Then the location register knows which base station the mobile phone has arrived at. After roaming to the next base station, the two base stations are switched and the next location of the user will be sent back to the location register. This process is performed automatically by the mobile phone.

2. What is the mobile phone card:

3. Mobile phone card refers to SIM card. SIM card is an IC card held by mobile users of GSM system, which is called user identification card. The GSM system uses SIM cards to identify GSM users, and the same SIM card can be used on different mobile phones. GMS phones can only use the network after inserting a SIM card. SIM card is the key for GSM mobile phone to connect to GSM network. Once the SIM card is unplugged from the mobile phone, the mobile phone will not be able to enjoy all kinds of services provided by the network operator except emergency calls. In addition to being a key, SIM card also provides a lot of convenience for users. Users only need to insert or embed the SIM card into any GSM terminal to achieve communication. The SIM card also manages a large amount of information provided to users, which can be used to store text messages, especially those received during the user's absence or absence. On May 12, 2021, the Ministry of Industry and Information Technology held a teleconference on the prevention and control of telecom network fraud in the information and communications industry to strengthen the control of key business risks such as phone cards and IoT network cards, and precisely crack down on illegal trading of telephone cards and IoT network cards.

This is the end of this article. I hope it will be helpful to all of you.

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