Can I use a short message card without a mobile phone number?

In today's era of big data, it is very common for mobile phone numbers to be leaked or defrauded by unscrupulous harassment. You don't need to change the card. If you have been encountering spam messages, you will usually open the SMS page, and then there will be a detailed message (or a three-point icon) in the upper right corner. Click on the detailed message or that icon to see the detailed information of the advertiser who sent the message. Then there is an option to block this number (anyway, there are some blacklists), and then you just click to block this number or join the blacklist, and you will receive a spam message. Please do it. I hope my answer is helpful to you and can be adopted.