Don’t install the newest firmware immediately, you need to do incremental updates for the panel.
You can read more about that here: Vivint firmware update
Also, when you install the new cell module, Surety will reset lockout, and change 2203 installer code, but you still might want to fully optimize the Vivint panel, and enable it. A lot of code requirements have changed since Vivint’s 1.9.6 firmware variant, so some of the older defaults are not up to current code requirements.
You might want to also change the default User 8 code (2580)
for more info on fully optimizing the vivint panel, see: Vivint panel optimizing