What about degaussing the mobile phone card?

If it is a new magnetic stripe chip card, you can try to wipe the chip part with an eraser for a few minutes. There is a great possibility of continuing to use it. If not, you must go to the bank to do it again. Let's start with the most commonly used bank cards. Bank cards are mainly divided into old pure magnetic stripe cards and new magnetic stripe plus chip cards. Generally, pure magnetic stripe cards cannot be recovered after degaussing. The method of rubbing clothes circulating on the Internet can only be a possibility. In most cases, you can only go to the bank and bring your ID card and other supporting materials to the bank. If you don't need the original card number, then you can get a new card. If you still want the original card number, it will take a few days. Bus cards and all-in-one cards are also commonly used and easy to degauss. If the bus card is demagnetized, it can only be magnetized at the place designated by the bus company. If the magnetization is successful, it can still be used. If not, you can only reapply, but the previous money may not be available. Many merchants' membership cards are easy to degauss, but usually, the card number is still the main part of the merchant information system except the magnetic stripe and chip. So even if the membership card is degaussed, it can still be used by manually entering the card number or scanning the code, or directly magnetizing it at the merchant. No matter what kind of card, degaussing can only be a remedial measure. The best way is to take preventive measures. Try not to stack multiple cards or get close to devices that are easy to degauss, such as induction cookers, microwave ovens, refrigerators, mobile phones, computers, etc. Expand data 1. What is degaussing? The strong magnetic field generated by high-frequency electromagnetic waves will magnetize the credit card, confuse the recorded information, and lead to the invalidation of the bank card. The record information of bank card and passbook are stored on the magnetic stripe on the back. The strong magnetic field generated by high-frequency electromagnetic waves when some equipment works will magnetize the credit card, confuse the recorded information, and lead to the invalidation of the bank card. In addition, if the magnetic strips of two bank cards overlap, they are likely to be demagnetized at the same time. In addition, some medical examination equipment, such as magnetic buckles in ladies' handbags, card readers on buses, magnetic resonance vibrators, etc., can also cause bank cards to be magnetized. It is suggested to use a core insert, which can effectively prevent the magnetic stripe from being worn, but it cannot prevent demagnetization. Although the ferrule is an insulator, it can't stop the strong magnetic field.