How to Delete Telegram Account Permanently (Deactivate)
If you deactivate or delete your telegram account, all your messages, groups, channels, contacts will be removed. To delete telegram account ...Continue
Sometime we need to turn off all device communications at once, like when we are in an airplane.
To do this, go to Settings > Wireless and networks, and check Airplane Mode.
You can also do this much easier via pressing and holding the power button and tap on the Airplane Mode button, if you have a Samsung Galaxy series smartphone (or tablet).
After that, all device communications, such as Bluetooth, WIFI, EDGE, Phone Calls ... are disabled.