Qualcomm Hs-usb Android Diag 902d Driver [upd] <Trusted Source>

Tools like QPST (Qualcomm Product Support Tools) , QCN (Qualocal Configuration Navigator) , and RF_NV_Manager require a functional DIAG port to read/write NV (Non-Volatile) items. If your phone has lost its IMEI, baseband, or network signal after a bad flash, the 902D driver is essential to restore a backed-up QCN file.