This login form is used for both purposes: either logging into the site with standard user login credentials (viz. username & password) or with SMS login button (below) using mobile phone.
You can register your mobile phone number once you have logged in to your respective membership account. However this SMS login will help you in accessing the basic features of the site as a user for the present. For accessing the member’s area you need to avail standard login credentials (username / or email id & password) only.