This document describes how to use the 1TopSpy cell phone tracking software to check a husband's Viber messages. 1TopSpy allows users to secretly monitor and track activity on another person's mobile phone, including GPS location, text messages, call logs, social media messages, photos and more. It claims to have millions of users and offers easy installation and 24/7 support. The document provides instructions on downloading and installing 1TopSpy on the target phone and accessing the monitoring features through an online account. Customer testimonials praise 1TopSpy for allowing mothers to monitor daughters and employers to track employees.