Signing in requires two steps: something you know (your password) and something you have (your phone). OTP codes are uniquely generated for your account whenever you need them. You'll receive them via SMS on your mobile phone or through the Netiks OTP mobile app.
If you don't have access to your phone, you can opt to create backup codes. These codes allow you to log in when your phone isn't handy, like when you're traveling. Each backup code is single-use only. Running low on codes? No problem—you can always generate more.