You can watch the video to know how the API works and how you can complete the SMS verification in just three steps. The video shows how to bypass facebook phone verification.
The countries currently available for bulk phone number verification are Russia, Kazakhstan, China, Poland, UK, Ukraine, Vietnam, USA etc.
The phone numbers are real sim cards and are not VoIP numbers. You can buy the API for bulk sms verification online. The prices depends upon the quantity that you buy per day, service and the country that you choose.
The phone numbers can be used to bypass Google, Facebook, Line, WeChat, VK (VK.com), WhatsApp, Telegram, Twitter, AOL, Yahoo, and any other mobile application that requires SMS verification.