There are always short messages on my mobile phone to report, but I didn't send them.

Try pulling the card and changing the phone first. The problem is still there. If it is a smart phone, first rule out whether it is poisoned. The solution is to take out the memory card and format the phone and then format the memory card. Remember to back up. If it is an ordinary mobile phone, if it is still a card problem. Ask the customers of China Mobile or China Unicom if they have started stealth business, or go to the business hall to get a new card.