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7. Other services and functions
MMS Postcard
Now you can send a photo from your mobile phone as an actual postcard.
Go to Menu/Messaging/Create message/MMS Postcard. Enter the name and address 
(you can press   to use information from your Contacts). Then press Options/Insert  
to add a photo or take a new one. Swisscom Mobile will have it printed on a postcard 
and sent by mail.
Phone hints
1. Keypad lock
To lock the main keys, quickly press   then *. To unlock them, quickly press   then *. 
2. Silent mode
Briefly press (at any time) the Power key   to bring up the Profiles menu. Choose 
Silent and press OK. To restore sound, do the same and choose General. You can also 
press and hold the # key to turn silent mode on or off.
3. Flight mode
Also in the Profiles menu is Flight mode, which turns off the mobile network 
connection. Choose this mode to use your Nokia 6131 when normal mobile phones 
must be switched off (on planes, for example).