Friends, here is a very important trick for your android phone.
If you've an android phone and u have forget your pattern lock and email than don't need to hard reset.
Just follow below steps:-
Method: [adb shell method](root only)
Steps :

• Connect ur locked Android  device in pc and open adb shell.
• Then type the following :

su

rm /data/system/device_policies.xml

rm /data/system/gesture.key

• Then restart the device.

Now u can unlock your device with any pattern and then in Settings u can change lock setting.