What is the function of SIM card?

In this era of smart phones, we can't live without mobile phones everywhere. Similarly, the operation of the mobile phone can not be separated from the support of the SIM card. Now the SIM card of the mobile phone has become an important symbol in our daily calls and the only identity symbol for dialing.

How much do you know about SIM cards? What useful functions are hidden in it that we don't know? Next, let's talk about SIM card!

-Two often overlooked but useful SIM card functions-

1. Store user-related data.

When it comes to SIM card storage, we are most familiar with the storage of mobile phone address book numbers. In fact, we also store these three types of data: fixed data (mobile subscriber identification number IMSI, authentication key KI), related network data (mobile subscriber temporary identification code TMSI), related service codes (personal identification PIN code, unlocking code PUK) and so on.

Don't underestimate these data storage functions. It is precisely because of these data storage functions that this 5G super SIM smart chip card can identify and use electronic files such as our electronic identity, access control unlock code and U-shield certificates of many banks.

At present, it is being put into trial operation, so in the future, the 5G smart SIM card will no longer stop making phone calls and surfing the Internet, and become the best smart partner for our future portability and light life.

2, PIN code security protection

Do you feel familiar and unfamiliar when you hear the PIN code? It is mainly the function set when we apply for a card. In fact, PIN codes are very useful in protecting personal information.

When your mobile phone is dropped, even if you have a screen lock password or fingerprint lock, iris recognition and face recognition, it is useless, and it is likely to be manually cracked and stolen, only the PIN code is not!

So as long as this security measure is turned on, once your mobile phone SIM card is removed or turned off and restarted, it cannot be used on other mobile phones. But also can prevent the money of Alipay, WeChat and bank card from being stolen.

The new generation of 5G super SIM card combines PKI asymmetric encryption technology and high security chip, embeds the encryption protection function of bank U shield into the card, upgrades it to SIM shield, and connects this function to the protection link of mobile phone financial transactions.

When using mobile phone to transfer money, you don't need to carry and install a U shield. By adjusting the SIM shield in the card, the funds are protected and authenticated by the chip +PIN code, so that the money in the account is firmly locked and stolen seamlessly. Currently, SIM shield is being used in cooperation with Shanghai Pudong Development Bank and China Bank.

-How to quickly handle the SIM shield and experience? -

1. Confirm whether the SIM card of the mobile phone supports the SIM shield function.

Method 1: SMS query

Send the short message "CXSIM" to 10658 104 to inquire whether the SIM card supports the SIM authentication function.

Method 2: Pay attention to the official account of "SIM Shield" WeChat.

Click on the menu bar to handle business-open SIM shield ability query.

2. Activate online.

User application process of Shanghai Pudong Development Bank

1. Scan the QR code-download and log in to Pufa APP- search for SIM shield management-enter the SIM shield function to see if it is supported.

2. Click on the mobile phone shield to sign the contract-complete the face brushing authentication-click on the activation-complete the activation.

China Bank User Application Process

Login to the Bank of China APP- click My-click Security Center and Settings-complete signature and activation-click Manage SIM Shield-click Manage Security Tools.