vfd 513 7.1.1 unlock failed

--------- 2018-05-14 11:26:06 ---------
SigmaKey 2.27.19 Qcom: Direct unlock
ZTE Handset Diagnostic Interface (COM36), Provider: ZTE Corporation, Driver ver.: 5.2088.1.2, Date: 10/31/2012, USB\VID_19D2&PID_0249&REV_0310&MI_00
Version: AU_VDF_P809V51V1.0.0B12,
Firmware: MPSS.JO.3.0-00291-8909_GEN_PACK-1
Date: Jun 17 2017 11:25:58, Apr 24 2017 03:00:00, 8909.gen
Software IMEI: 357850080106880
Bluetooth address: 000000000000
Unsupported phone model