If you signed your passport incorrectly or there is a mistake in your signature, you may leave it if it is not too bad. If you think you need to change it, simply strike a single line through the mistake and sign the correct signature. If this is not good enough, you may need to apply for a replacement passport.
Only works on rooted devices (or devices with Recovery Mode) Disable ADB on screen off and enable ADB *after* screenlock is unlocked. Source code (+artwork) freely ($0) available on demand by email. Adb-Lock helps protecting Android (prior to 4.4.3) against the adbd authorisation bypass attack by (found by Henry Hoggard, MWR Labs).
You can choose several settings, one of which is disable. You can disable Lock Screen by  disable  option or you can remove PIN by  insecure lock screen  option. OR. Turned off the screen, turned it back on and clicked on Forgot in the right down corner.