Lots Of time we faces a problem when working with sptool when we flash mtk androids..so frnds we discuss and share here sptool problems/errors..why it happens..and what is its solution... There is some mode in mtk for connect phone to pc,read below to know more =: BOOTROM := (in Device Manager is usually seen as MTK USB Port with pid = 003). In order to connect your phone in this mode,we need some key combinations,like vol up + cable connect or home button + cable connect,we have to keep try until we found correct key for this Sometime we need special cables or test points to get this mode. =reloader := (Port MediaTek USB VCOM with pid = 2000). Its most common mode in mtk android phones,when we trying to flash phone using sptool and connect phone in power on phone condition to usb,phone connect as preloader Is it sometime hard to install drivers in this mode,as its quickly disappear,but its not much hard if you faster then your pc Just kidding you should install driver from exe base installer =: DA_HIGHSPEED := (Port MediaTek DA USB VCOM with pid = 2001). Ok when you flash your phone,you connect first in bootrom mode or in preloader,as sptool detect your phone,its give command to phone for DA_Highspeed download,to load the firmware in phone. So it will always good to check drivers when flashing phone with sptool,if sptool giving error after the first red line,you should check for Da drivers. ================================================== ======== =: Guide How To Disable DA Download All := Sometimes off mode DA Download All helps to avoid errors on phones with MTD (nand) flash. The latest versions of FT this can not be done from the menu, you must change the file platform.xml (Inside sptool flasher). You need to change in the platform of your phone keys usb_download_support and da_dl_all_support to "true" to "false" Warning! This only works if not marked daw blocks preloader and dsp_bl! If you need to sew the blocks, it is necessary to put true! After these changes, you must connect the cable to the PC immediately after clicking on Download , and wait for the end of the frame.