ZTE OPEN roamer2 unsuppoerted modell!

Here is Sigma log:

SigmaKey v.2.15.00
New version  2.15.02 is available on www.sigmakey.com. We strongly recommend to update SigmaKey!
868960569 Sigma dongle 2.15, Initializing...OK
Pack 1: Activated
Pack 2: Activated
--------- 2016-02-11 19:58:03 ---------
SigmaKey 2.15.00 Qcom: Direct unlock
ZTE Handset Diagnostic Interface(DFU) (COM69), Provider: ZTE Corporation, Driver ver.: 1.2066.1.3, Date: 2010.04.29., USB\VID_19D2&PID_0112&REV_0231
Version: EU_DEV_FFOS_V1.1.0B06,
Firmware: 76XXU-USNEKOLYM-2040
Date: Jan  7 2014 01:00:16, Mar 19 2013 04:00:00, USNEKOLY
IMEI: 865460010364677
Bluetooth address: B00706B6E878
Unknown firmware version. Do you want to try heuristic method (it may take several minutes)? [YES]
Unfortunately, heuristic method have been failed.
Please send
C:\Users\User\Documents\SigmaKey\temporary backup5460010364677_USNEKOLY_Jan  7 2014_010016_Mar 19 2013_040000.skb
Unsupported phone model