\chapter{IMSI Catcher Detection} \section{Frameworks and Hardware} \subsection{OsmoconBB} \subsection{Motorola C123} \subsection{GNS 5870 MFI} \section{Procedure} \subsection{Information Gathering} \label{sec:info_gathering} \subsection{Information Evaluation} \subsection{Further Improvements} \section{Implementation} \section{IMSI Catcher Detection System} \subsection{Configuration} \subsection{Operation}