Use the following to unlock your phone :
1. First solution is to use Google account associated with mobile.You need to log
in into your Google account and then you can disable or change the pattern lock.
2. Second solution to overcome “Too Many Pattern Attempts” problem
is to format the mobile device.You need to make hard reset of your mobile to
overcome pattern lock problem.For most of the Android devices ,you can hard
reset the device by pressing POWER + VOLUME + HOME button simultaneously.
3. Third solution is to use desktop app.You need to know username and password of
Google account associated with your mobile device.Name of the app is Screen
Lock Bypass Pro.
More info here : http://technomi.com/too-many-pattern-attempts-solution/