The weakest link in Two Factor Authentication: Your Phone
When we configure Two Factor Authentication for customers the most convenient way to do it is using SMS or an app on their phone. You almost always have your phone with you and its easy to use as second form of authentication. However many users do not have their phone secured. If your phone has any authentication methods tied to it, or has any important data on it for that matter you need to secure it with a PIN. While a PINB adds a delay in accessing your phone it ensures someone who picks up your phone cannot easily use it to circumvent your Two Factor Authentication.