You can lock your device remotely using a predefined text message. You can also lock the memory card remotely.
Enable remote locking
Select Menu > Settings and Phone > Phone mgmt. > Security settings > Phone and SIM card > Remote phone locking > Enabled.
Enter the text message content (5-20 characters), verify it, and enter the lock code.
|Lock your device remotely|
Write the predefined text message, and send it to your device. To unlock your device, you need the lock code.