codes & passwords
Your phone's unlock code is originally set to 1234. The security code is originally set to 000000. If your service provider didn't change these codes, you should change them:
Find it: M > Settings > Security > New Passwords
You can also change your SIM PIN or call barring passwords.
If you forget your unlock code: At the Enter Unlock Code prompt, try entering 1234 or the last four digits of your phone number. If that doesn't work, press M and enter your security code instead.
If you forget your other codes: If you forget your security code, SIM PIN code, PIN2 code, or call barring password, contact your service provider.
check battery meter
To check your battery meter:
Find it: M > Settings > Phone Status > Battery Meter