simparser.pl is a tool that can decode SIM traffic created by the HTerm application. Once HTerm has received some traffic, press the arrow button next to "Save output", and set the storage format to "Hex". Enable the Timestamps tick box. Now, save the .log file to the same directory as simparser.pl. Then, open the file in a text editor and add a header with no empty lines, ending in a single empty line. (If you don't want to add a header, prepend the actual data with a single empty line.) For example, the top of the file may now look like this: Date: 13 december 2011 With: RebelSIM, HTerm ME: Nokia 3310 (1) Baud rate: 8431 17:13:02.197: 00FF 17:13:02.197: 00 [..] Then, run: simparser.pl <filename> For example: simparser.pl output_2011-12-13_17-15-06.log The simparser will first write your header to standard out, followed by a parsing of the protocol. Written by Sjors Gielen <s.gielen@student.ru.nl> in 2011-2012 for the "SIM Toolkit In Practice" bachelor thesis.