What is CLF?
Cell Signal Monitor and Cell Coverage Map uses CLF files containing information about mobile network cells. CLF files were used in some Nokia mobile phones for logging cell data: Cell Id, LAC, MCC, MNC, location etc. Cell Signal Monitor and Cell Coverage Map can import CLF files as a source of information about cells locations. The apps support CLF files of version 3.0.
CLF version 2.0
Lines of file have the following format:
|CellId||Cell identity (hexadecimal)||5 digits|
|LAC||Location Area Code (hexadecimal)||5 digits|
|MCC||Mobile Country Code||3 digits|
|MNC||Mobile Network Code||2 digits|
|<TAB>||tabulation character||1 character|
|Data||Data about a cell||text|
CLF version 2.1
Files have the same format as in version 2.0 but CellId and LAC are stored as decimal values.
CLF version 3.0
This format uses more information about cells. Lines have the following format (fields are separated by a semicolon):
|MCC + MNC||MCC and MNC (without spaces)|
|LAC||Location Area Code|
|RNC||Radio Network Controller|
|Data||Data about a cell|
CellId and LAC can be decimal or hexadecimal.