Hi there,
The configured Local Name parameter "FMB_120_%imei7" is supported from 03.25.05 firmware version and up.
Kindly check if you are using the same Firmware or latest one on your testing. Also, if the Local Name field is left empty then name will be automatically generated as FMB120_<last 7 IMEI digits>.
Have a great day ahead!
Regards,
Patrick S.