This application displays information about the current GSM network Base Transreciever Station (BTS) you are connected to. To get the most out of this application, manually select GSM as network carrier. To get a location of your BTS, type in MCC, MNC, LAC and CID and press the button BTS lat/long to get the location. The location (grid) is an estimated location based on third party location collection. Press the button locate BTS to get the position marked on google maps. This application displays MCC and MNC as one (Eg. 24007). The first three numbers are usually the MCC and the remaining two are the MNC. Sometimes the lat/long respons misses out the beginning numbers of the location. (Eg. 1 instead of 17). Just type it in manually and you are good to go. This application is not 100% accurate when it comes to display the BTS location on the map, but it gives you an indication of where the LAC is located.

For more information about Cellular networks: https://en.wikipedia.org/wiki/Cellular_network