EFS Explorer is a full-fledged file manager that helps to work with the "contents" of the device. For example, the QPST Configuration module allows you to select a COM port to work with the device, RF Calibration and TM Application tools are used to calibrate and test the RF path, respectively. ![]() The tools in this package are used for the most operations. Most often, the need to use this program is mentioned in the manuals for "firmware" of various Android-devices. QPST stands for Qualcomm Product Support Tools. Also, these chipsets serve as a "heart" for some modems, because Qualcomm is one of the largest players in the CDMA and 3G networks market. ![]() They are installed in many smartphones and tablets made by Samsung, Huawei, Lenovo, ZTE, Nokia. QPST is a set of tools that are designed to change some important Qualcomm chipset parameters.
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