Airlines ban the use of cellphone signals during flights. But they don’t actually ban the use of cellphones themselves. So you can still use your Droid 2 to run apps, play games, and so on, as long as its radios aren’t turned on.
That’s where Airplane mode comes it. It turns off all your Droid 2’s radios but lets you use your cellphone for everything else.
There are two ways to turn on Airplane mode:
Use the Power Control widget. Go to the Power Control widget (Connecting via Wi-Fi). Then tap its rightmost icon—the one that looks like an airplane. It turns orange and switches off all of the Droid 2’s radios.
Use “Wireless & network settings”. From your Home screen or any pane, press the Menu key, select “Wireless & networks”, and then select Airplane mode. A green checkmark appears to show that you’ve turned it on. To turn it off, tap it again.