The airplane mode or offline disable your wireless connections Galaxy Tab, this means you can not make or receive calls or connect to the Internet when this mode is activated. To activate:
- In the Home screen, press the "Menu> Settings> Wireless & Networking> Offline profile"
- The check mark is green, and a plane appears in the notification panel.
Tip: To avoid having to do all the above, press the on / off (side) of the computer for a couple of seconds and click on "Profile off-line
To turn off offline mode repeat the above steps and remove the check mark, this should change color to gray.