MC7710 FSN(Factory Serial Number) problem

I bought a MC7710 module from eBay.i find the there are no FSN(Factory Serial Number) in the module when i test it . Anyone know how to write the FSN code by AT command port? and what’s the AT command for FSN?

The following is read from the MC7710 module:

ati
Manufacturer: Sierra Wireless, Incorporated
Model: MC7710
Revision: SWI9200X_03.00.05.05AAP R6394 CNSZXD00000132 2014/05/23 18:57:22
IMEI: 351828045296679
IMEI SV: 7
FSN:
3GPP Release 8
+GCAP: +CGSM,+DS,+ES
OK

Topic moved to the correct section

Thanks,
Moderator

Anybody know how to fix this problem? thanks.

Hi,
I am wondering how you got the module via eBay.
We don’t know what exactly happened to the module. In this case I afraid we cannot support you.

Please be noted we recommend our users to contact sierra wireless distributors for the modules required.

Thanks,
Moderator