Micromax Canvas Power - Manual (Page 34)

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2. Tap Lock to lock the selected message.
You can unlock the locked messages by tapping and holding the
desired message and then tapping Unlock.
U
SING THE
O
NSCREEN
K
EYBOARD
Some applications display the keyboard by default. In others, you will
be required to tap a text field, where you want to enter text, to open
the keyboard.
Tap to lock the
message.