Can I turn the "phone" off while using TP2 as a wi-fi router?

[Musicmama]

I need to use the wi-fi capabilities for a sales demo in a place where we can't otherwise get internet access as an outside vendor. I'd like to make sure that the wi-fi signal doesn't get interrupted (plus avoid the potential embarrassment of phone calls) during the demo. Is there a way to block the phone while using wi-fi?

I'm presuming that airplane mode is not the answer. Thanks all.

Verizon TP2 on stock WM6.1 rom, using the famous XDA internet sharing app.