i try to unlock 3unit 1600 with MT-Box then get this

Phone is in: Local mode
Model: RH-64 ( RH-64)
V 4.04/03-01-06/RH-64 (c) NMP/N1600
Production serial number KKK676257
Product code 0532547
Module code 0202591
Basic production code 0520754
Flash code
Order number
Product specific data
Long production SN
MCU SW V 4.04/03-01-06/RH-64/(c) NMP/N1600
HW 0502
PCI
UEM 1314
UPP 8705
RFIC 0500
DSP P05w06.v28
LCD SEID:S31va0
PPM V 4.04/03-01-06/RH-64/(c) NMP/N1600/MD
ADSP SW p,V 4.04\n03-01-06\nRH-64\n(c) NMP\nN1600\nmd
IMEI: 358382006937064
V 4.04/03-01-06/RH-64 (c) NMP/N1600
IMEI: 358382006937064
ProfileBits: 2140700000000000
Operator: 8000000000000002
Closed on Mcc Mnc: 21407F
Closed on Mcc Mnc: 21402F
Phone is in: Local mode
Imei: 358382006937064
SIM Unlock FAILED

ok....need downgrade to v3.42 first then unlock,after upgrade...

Thank to liki999 for support !

yes u can unlock 1600

MT_Box_V1.22 can unlock 1600 test by me
chai