Can't upgrade nRF9160 Modem FW beyond version 1.2.3

[Scott Jacobsen]

I'm trying to upgrade the nRF9160 modem FW on our nRF9160-DK.  Programmer v2.2.2 indicates success but the at commands continue to return 

at+cgmr

mfw_nrf9160_1.2.3

OK

at+cgmm

nRF9160-SICA
OK

I've tried both mfw_nrf9160_1.3.1.zip and mfw_nrf9160_1.2.7.zip

Thoughts?

[Scott Jacobsen]

Also, 

at%hwversion

%HWVERSION: nRF9160 SICA B1A
OK
Ready