Firmware Version:  SMBT32-1.01-4-10
Date:  2021-09-01
ChangeLog:
    Some optimizations

Firmware Version:  SMBT32-1.01-3
Date:  2018-08-01
ChangeLog:
    1. Enhanced error correcting capability for SIM data
    2. Added feature "Billing Increment(s)" for "use Build-in SIM Server" mode