ONE TIME PASSWORD (OTP) by SMS

Can you already generate the OTP and store it in your data base?

To send SMS, you might want to learn about these folks:
http://www.twilio.com/

This might be helpful, too.
http://www.slipstick.com/outlook/smscell.asp

 no database of OTP
 mainly looking for OTP provider

Not much help here.  
http://lmgtfy.com?q=OTP+provider

Can you describe the way you would use an OTP provider service?  I could write one for you.  Guaranteed unique passwords, etc.

  the website has user account registration. In registration it is must to enter mobile number
  on next step of registration it needs to enter password obtained from mobile . if it is wrong entry the   registration cannot complete .
 

OK, I think I understand.  Have you set up your account registration page yet?  If so, can you please post a link to the page so I can see what it looks like?

Would you want to use the OTP as a web service?  Example: You send the service an API key and a mobile number (from the registration) and the service replies with a unique password.  You could either store this password in your own data base, or you could call the web service again with the mobile number and the client password.  The service could tell you Yes or No on a match.

  it is like below

  username---------
 password----
  location-----------
  mobile number----------- press next.....enter activation code
  sending an sms to mobile number
  user checks his mobile and gets a activation code
  user enters activation code.....registration of username successfully completed

  in this activation process , how it can make in the website

 
 yes you are correct
 

OK, great - is there a question remaining, or are you able to write the programming now, or do you want to hire a developer?

 not hiring any developer ,  web developer is developing the website . I dont think they will do this programming .... so i need to know OTP providers in the market . (like sms gateway provider)

Why wouldn't the web developer do this programming?  It's a crystal clear design pattern and very easy to program.  In addition, you would have an absolute requirement to keep the OTP on your servers, so why not just generate the OPT on your servers?

 i am not a programmer , so it is difficult to understand logic . i heard about sms gateway so that a user can send sms from the website . In this case web developer only keeps API of sms gateway on the website . In OTP case , not only sending sms , it has to send different codes and also when user enter the code it should match . is it possible to do by sms provider companies those who provide OTP . How it can match the code when user enters .

 i gave contract for web development , they told they can link sms gateway API if i register with sms providers . My doubt , for OTP does it need to do more things

Copy the information here: ID:34175952.  Show that to your developer.  If they understand and can help, great.  If they don't, get a new developer.  If you are not a programmer it doesn't do us much good to try and discuss programming.  It would be like talking German to someone who does not speak German.

Best regards, ~Ray

not exact answer