Cellular Z is a telecom signal quality and Wifi network info, channel info software, the main functions are as follows: 1.Dual SIM mobile phone network information (SIM card serving cell, serving cell signal quality,neighboring cells). 2.Wifi information (connected, nearby Wifi list, Wifi channel 2.5 and 5 GHz). 3. Current location information GPS Satellites 4. Device information (battery, hardware, system). 5.speedtest. 6.Map track,indoor coverage. PS: READ PHONE STATE &a mp; ENABLE LOCATION is necessary , with out these permissions app can show nothing !!!... Read more