Abstract: A multi-mode data card includes at least two mode modules, and also includes an external interface module and an interface control module. The external interface module connects to the interface control module. The external interface is configured to connect with computer for data interaction; the interface control module is equipped with at least two channels, and said at least two channels connects to said at least two mode modules respectively. The interface control module is configured to: when the multi-mode data card is calibrated, connect the external interface module with the channel corresponding to the mode module to be calibrated, and switch the multi-mode data card to the mode to be calibrated. A method for calibrating multi-mode data card is also provided in the present invention.

Abstract: A multi-mode data card includes at least two mode modules, and also includes an external interface module and an interface control module. The external interface module connects to the interface control module. The external interface is configured to connect with computer for data interaction; the interface control module is equipped with at least two channels, and said at least two channels connects to said at least two mode modules respectively. The interface control module is configured to: when the multi-mode data card is calibrated, connect the external interface module with the channel corresponding to the mode module to be calibrated, and switch the multi-mode data card to the mode to be calibrated. A method for calibrating multi-mode data card is also provided in the present invention.

Abstract: A method and device for firmware downloading pre-processing, a method for verifying the integrity of a firmware, a method for downloading a firmware and the terminal thereof, based on OTA technology, are provided. In the method for downloading a firmware, a predetermined process is performed on the firmware to be downloaded to generate first digest data; the firmware to be downloaded and the first digest data are regarded as the air information to be downloaded by the terminal; the terminal downloads the air information via the radio channel, and obtains the firmware and the first digest data in air information; the terminal performs the predetermined process on the firmware to generate second digest data; the terminal compares the consistency between the first digest data and the second digest data, and in the case that the two are consistent, it is determined that the firmware passes the integrity verification. The method increases the safety of downloading the firmware over the air.