The film tells the creepy story of a woman named Sadako who gives curse to anyone who have seen her video. Watching her video will bring you to your own death, you will get the confirmation that you have the curse through Sadako as well. In the film, Sadako calls anyone who have seen the video right after they stopped watching the tape.
In all versions of the Ring cycle, she appears as a shadowy young woman dressed in white, whose face is concealed behind her long black hair. The first film explains that, as a young girl, she was thrown into a deep well and left to die. Her spirit survived, however, and put itself into a video tape that kills anyone who views it unless someone else watches it within seven days. If not, Sadako herself emerges from the television screen, and the viewer dies of fright - wikipedia
It is already a no-brainer that Sadako is one of the most scary and creepy horror film antagonists of all time. And it looks like that her legacy is not going to be forgotten anytime soon as another urban legend was said to be from her as well. The phone number from hell also known as SADAKO's phone number.
Sadako's Phone Number - 090-4444-4444
The number will probably only work in Japan, but you can try calling it by using Japanese country code +81
There are other claims that someone who did not bother to call the number still got haunted by Sadako. Right after the number of Sadako spread like wildfire, A user took it to Internet to share that she receives phone calls late at night from the same number. She thought it is only a prank call but as the days goes by, the noise from the number gets eerie. That's the time she posted the number online and people who have seen it told her that it is the same number from the Sadako Phone Number Urban Legend. Since then, the girl who receives calls from Sadako did not update her posts.
The legend of Sadako is surely not something that goes away forgotten, Sadako stands as one of the creepy woman that graced the movie screen and haunted people through her urban legends.