unlock ZTE MF90 error code 19

[ceyad]

i try to unlock ZTE MF90 and got this error:

===================================================================


DC - Unlocker 2 Client 1.00.1057

Detecting modem :

selection :
manufacturer - ZTE modems
model - ZTE MF90

Found modem         : +CGMM: MF90
Model               : ZTE MF90
IMEI                : 862927020157666
Firmware            : BD_BOLT_MF90V1.0.0B05
Compile date / time : Oct 18 2013 12:53:09
Chipset             : Qualcomm
NAND Flash          : H9DA2GG1GJAMCR
SIM Lock status     : Locked (Card Lock)

===================================================================

Unlocking, please wait ... 

unknown error

Error code 19


unlock failed !


===================================================================

everyday i use dc-unlocker to unlock MF90.
more than 5pcs/day. never get this error.

[Vincentas]

Try to restart modem and software and repeat unlock.
Also, disconnect other zte modem if are connected to computer.