While firmware updates generally don't affect the SIM card, ensure any SMS or contacts stored on the modem's internal memory are backed up.
Never disconnect the modem during the flashing process, as this can "brick" the device, making it unusable.
Third-party archives like Huawei Firmware Update host various versions of dashboards for Windows and Mac, as well as the firmware updates themselves.
Includes a built-in Micro SD card reader supporting up to 4GB .