Opokua Kwapong, who lives alone in the US state of New York, was disturbed when he was having a video chat with FaceTime with his sister Adumea Sapong, who lives in Manchester, England.
Noticing that his 58-year-old sister had a speech disorder and was disturbed, Sapong warned Kwapong about his health and suggested taking medicine.
Later on, Aduemea Sapong, who called 911 by turning off the phone, let her go to the sisters of the health teams.
Kwapong's early intervention, apparently a stroke, saved his life.
Kwapong, a food engineer, said, "There is no doubt that my life has been saved by FaceTime.