How to unlock all kinds of pattern on your phone

[ul]Connect your device with the computer via USB cable[/url]
[ul]Open Command Prompt and key in the exact code as
displayed below:[/ul]

adb shell
cd / data/ data /com. android .providers. settings
sqlite3 settings .db
update system set value = 0 where name =' lock_ p
update system set value = 0 where name =' locksc
.quit
Reboot your device
You may now unlock your device providing whatever
pattern you like

Method 2

adb shell rm /data / system/gesture . key

After rebooting, unlock your device using ay preferred pattern.
As evident from the above, neither method disables the
pattern unlock. Instead, they just nullify the pattern order on
the lock screen.
Both methods have successfully been tested using a
combination of HTC Desire Z (running CyanogenMod 7.2) and
Windows 7 (64-bit Edition), and a good thing about these
solutions is that they work independent of, as well as in
tandem with, each other, so no harm in deploying them both
simultaneously. Once you regain access in to the OS, head
over to the system security settings, reselect your preferred
unlock method, and you’re good to go.
Special Note: The purpose of this guide is to help users with
employing an effective pattern unlock bypass solution only on
their own devices, instead of using it for malicious (read:
unethical) purposes. On the other hand, it begets the need to
keep USB Debugging disabled on your device if and when not
required in order to be on the safe side..........
Source =sarowap