Recently, I have a friend, and I always call him to say that the call reminder service of Shanghai Mobile is for you, and we will inform each other by SMS.

The information you provided can only confirm two things: 1, the other party has handled the missed call SMS reminder service; 2, the other party just didn't answer your phone, and your phone will be notified by SMS. As for whether you want to guess whether the other party has added you to the "blacklist", you need to do three things: 1, and remember whether there is anything that makes the other party disgusted or bored in the process of getting along with you; 2. Call the other party with another phone, or go to him/her directly; Tell him/her that there is something wrong with your mobile phone and change it quickly.