The Tru Mobile has been used before but that was with a Netgear modem on my daughter's PC. When using it then, we loaded discs and opened the approriate connection, wasn't an issue.
I know that we have our network securted with passwords, which we have written down.
And as for A or B, I really don't know. And I'm not sure what a "firmwave" is.
I'm not really that techy, sorry.