I am facing an issue. I want to flash twrp into my coolpad cool 1 dual but my fastboot can't detect my device. ADB is able to detect it but as soon as I run the command "adb reboot bootloader" to boot my phone into fastboot mode fastboot doesn't detect my device any more.. I have tried updating the "android bootloader interface", " android adb interface" drivers but still nothing does work.. Tried a various types of usb driver available at xda in various threads but none work. What to do now? Please give me a solution to install twrp~