If I were to dial 911 with my phone in airplane mode, what would happen? Would the cellular radio activate automatically? Would e911 work? For obvious reasons, I don't want to actually test this.
If it matters, I'm using Cyanogenmod 7.2 on an HTC Droid Incredible 2. Cyanogenmod is based on AOSP, so I'm guessing it does whatever stock Android would do in that situation.