What is the reason for the failure of sim card?

First, it may be that the chip contact is not very good, or the quality of the card is too poor. Clean the chip first or try changing the phone.

Second, the mobile phone card is degaussed, and it is necessary to reissue the mobile phone card in the business hall.

Extended data:

SIM replacement requirements

Please go to the communication business hall where the number belongs 100 to reissue it, 2 yuan/Zhang.

1.GSM individual customer: the owner must hold a valid ID card to handle it.

2. M-Zone and Shenzhouxing: The owner who has completed the registration (verification) in real-name registration system shall handle it with valid identity documents; Customers who have not completed the real-name registration system (verified) shall be handled with valid ID+service password+call record.

Warm reminder: In order to ensure the rights and interests of customers and property safety, you need to take photos of "one person, one card" (taking photos and taking photos at the same time) when you apply for a replacement card.