Here is a link explaining airplane mode:
Airplane mode is a setting on many cellphones which disables their wireless communication abilities, theoretically making them approved for use on aircraft. While in airplane mode, a phone cannot send or receive phone calls, text messages, picture messages, or video messages, and the user may not browse the Internet on the phone or use BluetoothÂ® devices with it. However, functions like music players, games, calendars, and so forth can continue to be used. (This is from that website)
No, you are not supposed to be making calls, texting, browsing the web, etc while flying in a plane. If you really need to make a call for the relatively short time you are on a plane, then there are airphones that you can use, though pay an arm and a leg for.
at 7:45 AM on Jun. 15, 2010