The video, originally uploaded to TikTok, begins with someone holding up an iPhone, saying, “How to know if your phone’s been tapped.” The person then dials “*#21#.” Moments later, an automated message can be heard letting the caller know that the number dialed is incorrect.
“Tapped,” the person declares, suggesting that response to dialing “*#21#” indicates the device is being monitored. She then suggests that the displays on other iPhones showing various functions “disabled” in the video indicate those phones aren’t wiretapped.
In reality, the results of dialing “*#21#” do not show whether or not an iPhone has been compromised in such a manner. The featured sequence of special characters and numbers is one of several interrogation codes, also known as feature access codes, that allow users to quickly check iPhone functions, according to USA Today.