HI
I have a problem in my phone , i have tried to take backup from the phone through nubia recovery tool after i connected to this software my phone has dead.
no bootloader and recovery, only blank screen, if i connected to PC its showing QHSUSB_BULK in the device manager , Can any one help me to solve this issue..

Device :
Nubia z11 Mini nx529j MSM 8952 processor

 

Yes Exactly the same Application, its lost my phone. (Nubia emergency Tool V1.1.6)
I will tell you the exact condition of my device,
if i connect the device to pc its showing QHSUSB_BULK in the device manager, and its repeatably connecting and disconnecting with PC.
If i hold both volume and Power key to connect it vibrate and connecting to the PC,
and sometimes breath light is blinks for sometime,
after i have updated the driver manually to QDL Mode its stops disconnecting with PC,
Manually i have fix the driver from QHSUSB_BULK to Qualcomm HS QDLoader 9008

Here some pictures i have uploaded please refer it.

https://drive.google.com/open?id=1pgGLZshMFduDKi0eQ_U5WrCXxC98uMHp