The Phone Number is Real
In the first episode, the players receive a business card from a mysterious man who invites them to complete in the “Squid Game.” In addition to the company logo, the card also features a phone number, which happens to be real.
This created a problem as thousands of real people started calling the number asking to participate in the game and the owner of the phone number couldn’t simply change their number because they needed it for work related purposes. So, Netflix came up with a solution by editing out the phone number that appears in several key scenes.