All of a sudden, I always receive MMS messages from strange numbers these two days.

Never open the information of strangers, especially MMS, because many people use MMS to send viruses now. If you open it, you may catch a virus. After poisoning, the mobile phone will automatically dial the phone number in the phone book, causing unnecessary losses to you. Remember, if a friend sent it to you, he will tell you even if you delete it. If you receive it again, don't open it and delete it directly.