How do you know who it is when you receive sos distress message?

Dear hello, method/step 1 First, confirm the source and content of the short message, and confirm it as a distress message. Secondly, determine the source number of the short message, whether it is a known person or a stranger. 1: Only when we need to ask an emergency contact person to help us retrieve the account password will we contact our friends and the other party will know. Best answer: What should I do if my mobile phone receives sos distress information? 1 Confirm the source and content of the message and confirm it as a distress message. Check the source number of the message and see if it is someone you know.