NetMonitor Pro v1.82 [Paid] [Patched] [Mod Extra]
For Android 5.1 or higher. Dual SIM support. Try free version before buying. To see Cell on map BTS file must be loaded. ARFCN and Band are available for Android 7 or higher.
App could be usefull for cellular network engineers.

Current features:
- On-line monitoring of NR / LTE / WCDMA / GSM / CDMA network signal and services
- Monitoring and Analysis modes
- Widgets 2x1, 4x2 and 4x3 including Dual SIM
- Signal strength in Status Bar. Extended N