Abstract: The present invention relates to a transponder tag (10) that is operable by a mobile telephone, a mobile telephone for operating such a transponder tag (10), a method of operating the transponder tag (10), and a method for detecting the presence of a portable object. The transponder tag comprises a receiving unit (20) for receiving a wireless input signal. The transponder tag (10) is configured to obtain energy (EG) from the received input signal and to use the energy (EG) obtained from the input signal for transmitting by way of a wireless short-range connection a wireless output signal (SSR) that corresponds to a tag information (ITG) of the transponder tag (10). The receiving unit (20) is configured to receive a wireless input signal (STUP) at a frequency of at least one uplink band of a mobile telephone network.

Abstract: The present invention relates to a transponder tag (10) that is operable by a mobile telephone, a mobile telephone for operating such a transponder tag (10), a method of operating the transponder tag (10), and a method for detecting the presence of a portable object. The transponder tag comprises a receiving unit (20) for receiving a wireless input signal. The transponder tag (10) is configured to obtain energy (EG) from the received input signal and to use the energy (EG) obtained from the input signal for transmitting by way of a wireless short-range connection a wireless output signal (SSR) that corresponds to a tag information (ITG) of the transponder tag (10). The receiving unit (20) is configured to receive a wireless input signal (STUP) at a frequency of at least one uplink band of a mobile telephone network.

Abstract: A method is disclosed of operating a RFID-enabled mobile telephone for indicating information of at least one portable object (e.g. key, passport, glasses or medical box). The mobile telephone has an RFID communication unit and the method includes operating the RFID communication unit for receiving an RFID signal from an RFID tag that is attached to the at least one portable object; evaluating the received RFID signal for determining tag information; and presenting the tag information to the user of the mobile telephone for indicating current information of the at least one portable object. This way, up-to-date information of the portable objects is available precisely when needed.

Abstract: The present invention relates to a transponder tag (10) that is operable by a mobile telephone, a mobile telephone for operating such a transponder tag (10), a method of operating the transponder tag (10), and a method for detecting the presence of a portable object. The transponder tag comprises a receiving unit (20) for receiving a wireless input signal. The transponder tag (10) is configured to obtain energy (EG) from the received input signal and to use the energy (EG) obtained from the input signal for transmitting by way of a wireless short-range connection a wireless output signal (SSR) that corresponds to a tag information (ITG) of the transponder tag (10). The receiving unit (20) is configured to receive a wireless input signal (STUP) at a frequency of at least one uplink band of a mobile telephone network.

Abstract: A method is disclosed of operating a RFID-enabled mobile telephone for indicating information of at least one portable object (e.g. key, passport, glasses or medical box). The mobile telephone has an RFID communication unit and the method includes operating the RFID communication unit for receiving an RFID signal from an RFID tag that is attached to the at least one portable object; evaluating the received RFID signal for determining tag information; and presenting the tag information to the user of the mobile telephone for indicating current information of the at least one portable object. This way, up-to-date information of the portable objects is available precisely when needed.