Samsung s7 will send a short message to my other number to remind me to change my card! How to cancel it

Hello! According to the problem you described, there are the following situations: check whether the SIM card is inserted and used correctly, and whether the chip is oxidized for a long time. It is best to change the card in the business hall. Whether the other SIM card slot can read the card and try to restart whether the phone can be used normally. If the above problems are not solved, you can go to the nearest Samsung customer service center for testing.