Worked on strengthening access control for the Range Test feature in the meshtastic/Meshtastic-Android repository, focusing on preventing its use on public or default channels. Addressed a security concern by implementing a configuration guard that checks channel type, ensuring the Range Test cannot be enabled where it could be abused. Updated the user interface using Android Compose to reflect these restrictions, disabling configuration options when a public channel is detected. Enforced that any configuration saved on a public channel automatically disables the feature, maintaining a secure default state. Utilized Kotlin and Android development best practices to deliver a robust, maintainable solution.