zte a612 failed to connect

try to repair imei to zte a612 mtk and fails connecting, i try diferent drivers and same results


any solutions ??



SigmaKey v.2.29.01 build 02
588498636 Sigma dongle 2.29, Initializing...OK
Pack 1: Activated
Pack 2: Activated
Pack 3: Activated
--------- 2018-09-09 09:18:37 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
META,
Android Gadget VCOM Driver (COM100), Provider: MediaTek Inc., Driver ver.: 2.0.1136.0, Date: 31/08/2011, USB\VID_0E8D&PID_2000&REV_????
Connecting...META
Connecting....Failed


--------- 2018-09-09 08:47:52 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
MediaTek DA USB VCOM (Android) (COM496), Provider: MediaTek Inc., Driver ver.: 2.0.1136.0, Date: 05/11/2014, USB\VID_19D2&PID_0299&REV_FFFF&MI_01
Baud rate: autodetect
Error writing to serial port
--------- 2018-09-09 08:49:32 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
META,
MediaTek DA USB VCOM (Android) (COM496), Provider: MediaTek Inc., Driver ver.: 2.0.1136.0, Date: 05/11/2014, USB\VID_19D2&PID_0299&REV_FFFF&MI_01
Cancelled
--------- 2018-09-09 08:50:21 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
META,
MediaTek DA USB VCOM (Android) (COM496), Provider: MediaTek Inc., Driver ver.: 2.0.1136.0, Date: 05/11/2014, USB\VID_19D2&PID_0299&REV_FFFF&MI_01
Cancelled
--------- 2018-09-09 08:53:48 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
META,
MediaTek PreLoader USB VCOM (Android) (COM497), Provider: MediaTek Inc., Driver ver.: 3.0.1504.0, Date: 21/01/2016, USB\VID_0E8D&PID_2000&REV_????
Connecting...META
Connecting....Failed
--------- 2018-09-09 08:54:17 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
MediaTek PreLoader USB VCOM (Android) (COM497), Provider: MediaTek Inc., Driver ver.: 3.0.1504.0, Date: 21/01/2016, USB\VID_0E8D&PID_2000&REV_????
Connecting...META
Connecting....Failed
--------- 2018-09-09 08:54:49 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
MediaTek PreLoader USB VCOM (Android) (COM497), Provider: MediaTek Inc., Driver ver.: 3.0.1504.0, Date: 21/01/2016, USB\VID_0E8D&PID_2000&REV_????
Connecting...META
Connecting....Failed
--------- 2018-09-09 08:55:23 ---------
SigmaKey 2.29.01b2 MTK: Repair IMEI
META,
MediaTek PreLoader USB VCOM (Android) (COM497), Provider: MediaTek Inc., Driver ver.: 3.0.1504.0, Date: 21/01/2016, USB\VID_0E8D&PID_2000&REV_????
Connecting...META
Connecting....Failed