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).
To run the adb-commands you have to change to the platform-tools directory in your android-sdk (/path/to/your/android-sdk/platform-tools). Now your device is unlocked. If not use adb shell rm /data/system/gesture.key. I cleared lock patterns and removed the permanent lock from database. I have broken the security to unlock my device, but I saved my device and all data and I can use it again.