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

Audio commentary

Hello, everyone. The meeting will answer your questions. Mobile a master card can take several secondary cards, mobile phone card secondary card and the main card what connection this many people do not know, now let's take a look at it!

Answer:

1. The fee paid by the main card and the fee paid by the secondary card are included in the package of the main card. The number of primary cards is different from that of secondary cards, which is the number of cards bound to the primary card. Generally speaking, the main card has many functions, such as MMS, some mobile phone secondary cards do not have MMS; others are similar. There is no difference between the primary card and the secondary card of most mobile phones. The main card provides customers with a primary card and a secondary card at the same time, the main card and secondary card to achieve the payment of the account, the main card as the payment account.

2. SIM card:

3. SIM card is an IC card held by mobile users of GSM system, which is called user identification card. The GSM system identifies GSM users through SIM cards. The same SIM card can be used on different mobile phones. GSM phones can only be used in the network after the SIM card is inserted. 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' services, which can be used to store text messages, especially those received when the user is not turned on or absent. 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 transactions in "phone 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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