Donald I have tried following what has been recommended on the previous threads.
I removed the + from the SMSC:
+CSCA: "9037029920",129
I then receive:
+CMS ERROR: 305
As for upgrading the firmware. I want to verify That I should be using the ones from here:
https://source.sierrawireless.com/resources/airprime/minicard/74xx/airprime-em_mc74xx-approved-fw-packages/#sthash.OSzMN45y.dpbs ? Because I do not see newer firmware for the EM7455. These posts you link are using MC73XX not EM74XX, so I just want to verify I should be using the link above and not the ones they link to?