Text Message validation of phone number

They have: 426 posts

Joined: Feb 2005

I am building an application that takes a users phone number. To avoid people entering fake or even other peoples phone number i want to validate it.
I thought of sending a text message with a code and the user just needs to input that code to validate their number.
My question is, how can I send a text message and does anyone know if there are any free services to do this?

They have: 426 posts

Joined: Feb 2005

For your information, I have found a great service called AlloPass which is really easy to integrate into your site and will take payments via text message. The user has to receive a text message with a code to make it to the confirmation page.

They have: 1 posts

Joined: Feb 2012

Thanks for sharing and same question for the free services

They have: 11 posts

Joined: Mar 2012

yeah this is great service easy to use have used this application.But only problem with this service is to delay in message,
to deliver.

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