XT1640 with Baseband problem, is possible repair?

Hello. I have here one XT1640 with have BaseBand Problem.

He show baseband M8952_70009.08.03.46R DFLT_FSG

DFLT_FSG show the device have BASEBAN PROBLEM.

i'm flash the device with firmware:
ATHENE_MPJ24.139-50 - Android 6.0.1
ATHENE_RETAIL_7.0_NPJS25.93-14-18 - Android 7.1
ATHENE_OPJ28.111-22 - Android 8.1

With 3 firmwares, the device show the DFLT_FSG Baseband.

Is possible repair using Sigma Box or other box or dongle?