Sinch is a service that powers VoIP, verification, video and SMS for some of today’s leading tech companies. For apps that require voice calling and SMS for two-factor authentication, it implements their service and provides applications the ability to enhance their features and security. Featuring services like VoIP (Voice over Internet Protocol), two-factor authentication, HD video calling and more, apps can benefit from Sinch’s service by broadening their user base globally. Sinch can enhance features, but it can also be used to increase security with Flash Call Technology for phone number authentication.