OK, so I have a brand new 3GS made last year before week 32, so it probably has FW 3.1 or 3.1.2. It's still shrink wrapped in its box, but does have a valid company plan with a carrier.
I just need to jailbreak it.
So, can I go through the following procedure?:
1. Connect to itunes, register and activate it.
2. Let itunes upgrade it to 3.1.3
3. Jailbreak with Spirit?
Thanks for your comments!