In this article “Saw this tweet yesterday on Twitter:
The account is a parody… but the “tel:*2767*3855%23” is quite serious.
It’s a reference to a “vulnerability” which exists on some versions of Samsung Android phones, those running Samsung’s TouchWiz UI. (So, not Nexus.) And by vulnerability, we mean that some “genius” developed a feature to factory hard reset TouchWiz devices using an Unstructured Supplementary Service Data (USSD) code — without requiring a prompt from the user!”