This document describes how to use 1TopSpy cell phone tracking software to track someone else's Line messages. 1TopSpy allows users to track location, read texts, calls logs, social media messages, and browse history on targeted phones remotely. It claims to have millions of users and offers 24/7 support. To track Line messages, users download 1TopSpy to the target phone, register an account on the 1TopSpy website, and login to view monitored phone data including Line messages. Customer testimonials praise 1TopSpy for helping parents monitor children and businesses track employees.