Echo One is a highly versatile handheld cellular protocol measurement tool designed for comprehensive Layer 1–3 network testing and customisable end-to-end performance validation. Supporting 2G, 3G, 4G, 5G, Wi-Fi, and Bluetooth technologies, it operates on a wide range of commercial Android and HarmonyOS devices without requiring specialised hardware or modified firmware.

Its intuitive interface and advanced data logging capabilities make indoor and outdoor data collection simple while providing a complete view of network performance from the user’s perspective.