Pix7 lte Qualcomm unlock failed


how to unlock?
log from unlock attempt

Connect the phone powered off with both volume down and up pressed or connect the phone powered off and leave it connected to the usb till it shows the battery/charging screen ;
Phone detected (@usb.inf,%usb\composite.devicedesc%;USB Composite Device)
Preparing to enter download mode;
Preparing to open COM44
Connecting;
Init;
Port opened;
Phone detected (@oem252.inf,%qcomserialportdesc90080%;Android HS-USB QDLoader 9008)
Preparing to start flash mode;
Preparing to open COM47
Connecting;
Loading;
Init;
Port opened;
Hello Received;
ERROR: Boot loading failed;

Log file saved to: LOG_14_02_2016_20_52_16.txt

Time needed – 00:00:11