This Java library is a secure, lightweight SDK that integrates a frictionless user verification process into existing native mobile applications. The Auto Verify SDK allows mobile apps to use TeleSign's proprietary auto verification service to verify a user's device and phone number. The service securely sends a voice call or SMS to the user's device and automatically verifies the number. Using the SDK, your mobile app can invoke the following types of verification: Auto Voice verification, which sends a voice call and Auto SMS verification, which sends an SMS message. It integrates a frictionless user verification process into existing native Android applications. It allows mobile applications for Android to use TeleSign's proprietary auto verification service to verify an end user's device and phone number without embedding the authentication credentials in the application where they can be easily hacked and taken. TeleSign provides a way to build communications and account security into your web and mobile apps. It is a cloud communications platform that empowers Web and mobile app developers the ability to build powerful and secure communication products using a dynamic platform with a large global network. TeleSign supports numerous use cases from SMS and voice messaging, two-factor authentication (2FA), one-time passwords (OTPs), data intelligence, fraud scoring and more.