“dial2verify”

Cognalys - Free Mobile Number Verification Library For Mobile Platforms And Web

Cognalys, Inc. provides a free multi platform service which help application developers in verifying the mobile number in their applicatons. Cognalys two factor authentication uses missed call technology instead of the tradtional SMS based OTP technology. In case of rates, cognalys is much cheaper than the SMS method and supports more than 200 countries