Patent ID: 8688167
Filing Date: 2014-04-01
Classification: H04M,H04W

Abstract:
1. A mobile telephony device for testing the service quality of different mobile telephony networks, comprising: a multiplexer that holds several subscriber identity module (SIM) cards and that can be connected to a mobile station, wherein the multiplexer is a separate device with a housing and a connection piece, wherein the connection piece can be inserted into a SIM card holder of the mobile station, the multiplexer, comprising: the housing, a first switching component that is configured such that each one of the SIM cards can be connected to the mobile station; a controller connected to a second switching component for switching on and off the mobile station, wherein the controller is arranged in the housing of the multiplexer; and the second switching component configured to switch off the mobile station with a switch-off procedure initiated through actuation via the controller before one SIM card is being disconnected from the mobile station and another one of the SIM cards is being connected to the mobile station; and the mobile station that can be connected to a mobile telephony network by using one of the SIM cards.