Because everyone's own identity and account information are recorded and stored on the bank magnetic stripe card, if the magnetic stripe information is weakened, changed or lost, everyone's card transaction will fail.
Therefore, it is best to put the bank card in a wallet with hard skin to prevent sharp objects from being worn, scratched, twisted or broken; Don't store multiple bank cards together, and don't stack two bank cards back to back. Bank cards should be kept away from induction cookers, microwave ovens, televisions, refrigerators and other electrical appliances, and should not be placed with magnetic items such as mobile phones, computers, palmtop computers, magnets, music stars and business links.
When we say "degaussing bank cards", we generally mean those with a "magnetic stripe" on the back:
This bank card records your information through a magnetic stripe. When this magnetic stripe card is close to a strong magnetic field (such as a magnet), the information on the magnetic stripe will be easily rewritten and your information will disappear. This is what we call degaussing.
But basically this kind of magnetic stripe bank card has been gradually replaced by ic card. The mobile phone is simply not enough to generate a magnetic field that can degauss the bank card, so you basically don't have to worry. The other two magnetic stripe cards will not be demagnetized when put together. If the card fails, it may only be because the magnetic stripe is worn.
In addition to magnetic stripe bank cards, we usually come into contact with the following types of cards:
Contact IC card:
Contact IC card, embedded with yellow metal sheet, is not only a bank card, but also a home electric card and gas card. This IC card relies on the microchip in the card to store information, which has nothing to do with the magnetic field. Moreover, the SIM card of the mobile phone and this small metal piece are actually contact IC cards, so there is no need to worry that the mobile phone will "degauss" this card.
However, the metal sheet of the contact IC card is directly connected with the chip and works through the metal sheet on the card, and the withstand voltage is about 20V, so it is easy to be damaged by static electricity, and the static electricity carried by people may also damage the chip, so everyone should try not to touch the small metal sheet at will.
Cards without magnetic stripe and metal sheet:
ID card, bus card, meal card, community access card, elevator card.