Cant unlock W181

W181 selected.
Please wait
Connect phone to USB cable
Comport COM1 - connected
Searching device ...
Bootrom ver 0x0502
Phone found
Sending signature
Sending boot
Sending signature
Boot sent
Fail to bypass bootcore bug
Boot Loading Error
Communication error.
W181 selected.
Please wait
Connect phone to USB cable
Comport COM1 - connected
Searching device ...
Bootrom ver 0x0502
Phone found
Sending signature
Sending boot
Sending signature
Boot sent
Fail to bypass bootcore bug
Boot Loading Error
Communication error.

try with 2.0 and 2.4

Phone has new CPU, and its not possible to boot it.
Buy an unlock code.