Z550a can not unlock.pls. help!!!!!!!!!!!!!!!!!

[karikari]

Press Power On shortly !
Phone detected ...
Loading ...
Loader version:
070129 1112 NGUCXC125872_DB2010_PRODUCTIONIDLOADER_P4D

[PHONE DETAILS]

Baseband IC ID: 8040
Protocol ver.: 0301
OTP Cert. ID: 51
OTP Lock Stat.: 1
OTP Imei : 3535050******* PAF: 1
Color : RED
Erom Cert. ID : 51
Flash Chip ID : 897E

[UNLOCK START]

Press Power On shortly !
Phone detected ...

[UNLOCK END]

Error ... !

Operation Time - 00:00:14

please help me is urgent..........

[san21]

single band not unlockable now
Don't try other box it will dath

[sourav]

oh man, this phone 100% possible to unlock with se-tool 3. need setool box and 1 log.........

[LENRA]

i have same problem with z550a,where can i get flashfile for this model r6ga004_main_generic_ml_red51