Default Updating without Verizon service?

I'm using a DNA on At&t and I cant get the update even when I switch it to CDMA mode.

Do i have to actually manually download the update and install it?
Droid Dna * Droid 3 (flashed with xt883 radio for use on GSM networks) * Atrix 2 (piece of trash) *
Nexus 7(1st gen.)