Download the Library Files ( A zip folder )
Paste these two files GSMLibraryTEP.IDX and GSMLibraryTEP.LIB in to Library folder
If you are using Proteus 8 then Library folder will be within the data Folder (Proteus 8 Professional\Data\LIBRARY ) OR ProgramData (C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\LIBRARY)
Now open Proteus software (restart it if its already open) and search for GSM
Proteus work-space and they will look like as shown in below figure:
Function of all these three GSM modules are same but different in color.
It,s time to test our GSM module in proteus software, double click on it and a new window will appear as shown in below figure and add the GSMLibraryTEP.hex file in it.
******* Last three Images and library courtesy theengineeringprojects.com ********