Sms.codes.oi

For the better part of the last decade, the phone number has supplanted the email address as the primary identifier of a human being online. What began as two-factor authentication (2FA) for banking has evolved into a mandatory "gatekeeper" for social media, dating apps, and e-commerce. The premise is simple: to prove you are a real person, you must provide a unique mobile number.

Lena grabbed her keys.