Originally Posted by mcapozzi
If you're going to put the phone in Airplane mode, you might as well just shut it off and take the battery out. Then you'll be 100% safe. Even better, leave the phone behind. If you're that afraid, then I wouldn't even bring it into the building. Better yet, don't accept invites into buildings from people you don't trust. When I used to work in secure areas, the phones were always left behind, ALWAYS...
Mike, thanks for replying.
Granted, the phone won't be terribly useful while in Airplane mode, however, there's a chance this could turn into a job opportunity. The details regarding the invitation had nothing to do with any sort of shady dealing or random encounter on the street/in a store. As a result, my friend doesn't want to convey mistrust right from the get-go (which could be communicated by having the phone in an abnormal state like 'off' or 'not with me'. It's a tech company, so everyone's got phones, and they're always on). If the phone is used to get someone's information or take notes, they'd want to be able to use the phone to show they're comfortable. At the same time, they don't want to run the risk of them pushing anything onto the phone which will survive a full wipe or even an ruu flash. This way, if they weren't going to snoop in my phone anyway, no harm done. If they were, they'll find that they can't snoop later, and may work to an advantage.
Airplane mode seems a happy medium: being able to convey comfort, while being shielded from unknown attacks on the phone. There's reason to believe they'd notice something was odd if the phone wasn't readily available, or even in an 'off' state.