Sharp AQUOS Crystal - Manual (Page 415)

Settings 406
The screen lock is set.
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If you fail to enter the correct password after five attempts, you will be prompted to wait for 30
seconds before you can try again.
Important: To protect your phone and data from unauthorized access, it is recommended that you
use the screen unlock password (highest security). It is also recommended that you frequently
change your password to ensure the safety of your phone and personal data.
Disable the Screen Lock
Follow the instructions below to turn off your current screen lock.
1. From home, touch > Settings .