The short messages I sent to my friends were accepted by others. We are from Jinan, and the people I received are from Shigatse, Tibet. They also called me and said they had received me.

Can that person tell the content of your message? Are your friends sure that they will receive the same content at the same time?

This happened to my friend, too, but when she was on the phone, she suddenly interrupted another person, who was also on the phone, which was a bit scary. It seems to be a problem with the communication company. If you're sure it's not fraud, you have to find the communication company quickly. There is something wrong with your card.