After receiving a short message, my mobile phone suddenly sent out 20 short messages.

Hello friend, this is a malicious message. Did you reply to his message? You'd better check the phone bill now to see if there is any malicious deduction. If yes, please call 10086 to see if it is a one-time deduction or I will send you a text message later, and then cancel. If it is a one-time deduction, the money will not be recovered. Without deduction, there is no problem and nothing. I hope my answer can give you some help. I hope it can be adopted. Thank you.