wordpress plug-in for user verification

Dear Coders, I need a wordpress plug-in that will work in sign-up process and comments section that will verify the user with phone verification. The code will be in php, i need full documentation, must be easy to setup. I will provide the interfaces to start phone verification, and the callback interfaces. So summary; 1. the plug-in will work on user registration or during comment leaving 2. plug-in will automatically call the user's phone number, to verify 3. upon verification user will be let to do the rest of operation like a captcha way. I am open to suggestions by means of system work and budget. But again I need good budget and timing. If you have done a wordpress plug-in before, this will be an easy thing. Will give bonus to fast and good solution provider, and have got other projects on the pipe. Like to work with dependable coders in the long run, if I dont meet any problems. Addition: A similar plug-in is here: [[login to view URL]<wbr />plugins/register-plus/][1] Not that much details, I like the [login to view URL] way, a box to verify user. I will also need an admin panel on wordpress to setup verification parameters. Also, I will use a third party for doing verifications. Thank you.