What does the mobile phone PIN mean?

PIN code, the full name of personal identification number, is the personal identification password of SIM card. Mobile phone PIN code is a security measure to protect SIM card and prevent others from stealing SIM card.

The PIN code refers to the password of the SIM card, which exists in the SIM card and the factory value is 1234 or 0000. After activating the PIN code, you must enter the PIN code every time you turn on the computer and log on to the network.

Extended data:

Matters needing attention in using smart SIM card:

1. Do not bend the card, and be careful to protect the metal chip on the card.

2. Keep the metal sheet clean to avoid being polluted by dust and chemicals.

3. In order to protect the metal chip, please avoid pulling the SIM card out of the phone frequently.

4. Do not place the SIM card in an environment above 85℃ or below -35℃.

Baidu encyclopedia -PIN code

Baidu encyclopedia -SIM card