I'm in the AF (E-7), and many things have changed since I went through BMT (Aug 99).
I was just chatting with some of my airmen the other day and they were telling me about the cell phone policy. I found a page online that outlines what is allowed as far as cell phones go. LINK
It's not nearly as liberal as my airmen were telling me, but if you end up with cool/lazy instructor, don't be surprised if you are talking on your cell phone at night after your 6th week or so.
GL, and like the others said, don't volunteer for anything, don't stand out good or bad.
This post was edited on 2/2 at 9:53 pm