For Android 4. 3 or higher. Dual SIM limited support for Android 5. 1 or higher. If there is no BTS file, ARFCN and Band are available for Android 7 or higher. App could be usefull for cellular network engineers. Current features: On-line monitoring of GSM / WCDMA / LTE network signal and services. Widgets 2x1 and 4x2. Signal strength in Status Bar.