TEMS Automatic is a system for analysing the signal quality and accessibility in the wireless network. It consists of among other things of a number of mobile test units (MTU) placed in vehicles. Ericsson Erisoft has experienced need for a small mobile field tool to facilitate error detection and maintenance of the MTUs. In our exam project we have developed an application suitable for an iPAQ out on the field. The application reads trace messages sent from the MTU and have an option to save the messages for later analysis.