E5372T-601 No UI - Need Test Point?

[iphonefubiz]

11/16/2017 12:38:04 AM Starting to write device...
Validating file...
File to write: D:\My STUFF\DC-Unlocker\Firmwares\Huawei_E5372_Firmware_21.290.21 .00.00_general.dgtks
File version: 21.290.21.00.00
Looking for attached port...
Device has signed firmware
Error: signature verification NOT passed
11/16/2017 12:38:36 AM Writing device finished with ERROR

[Valdemaras]

What current firmware it runs maybe you know? Try flashing WEBUI only into it, maybe it will help restoring it.

[iphonefubiz]

It does not accept the same or higher firmware/WEBUI

Found modem : E5372T
Model : Huawei E5372 / MegaFon MR100-3
Firmware : 21.290.21.00.00
Compile date / time : Feb 05 2015 17:21:27
Hardware ver. : CL1E5372TSM02
Dashboard version : WEBUI_13.100.10.00.76_E5_V7R1_V3R2

[Valdemaras]

It does not accept the same or higher firmware/WEBUI

Found modem : E5372T
Model : Huawei E5372 / MegaFon MR100-3
Firmware : 21.290.21.00.00
Compile date / time : Feb 05 2015 17:21:27
Hardware ver. : CL1E5372TSM02
Dashboard version : WEBUI_13.100.10.00.76_E5_V7R1_V3R2

According to database info 21.290.21.00.00 is not flashable sadly. Probably as you say maybe only via testpoint.