...
To successfully use this package a valid SMS.To account is needed. You can create a new account as described at Account creation & verification on SMS.to : SMS.to
After installation is completed successfully you will be automatically redirected to the plugin settings. Fill in the fields as shown below., go to System >> Plugins >> then search for Two Factor Authentication - SMSto OTP and click on it. it will show the plugin configuration settings as shown below:
...
Setup
Each user can enable the Two Factor Authentication by edit his profile as described below image.
...