title: How can i verify a user registartion using sms verification?
body: <p>i want to create a user registration by sms verification. after entering mobile number in my website(php) will send(and also will be stored to database against user id) a random 4 or 6 digit code to users number. then user will have to enter that code to my websites confirmation page. then it will check that code with the stored code in the database. if it matches then user is verified. <strong>I want to know what will be the cheapest sms service i can use in india ?</strong> <strong>if there are any free ervice like this then it will be good(atleast for testing).</strong></p>