Hard reset or factory reset the Samsung Galaxy Tab 2 tablet to unlock the pattern lock or if the tablet hangs frequently. http://mytabletguru.com/differnt-hard-reset-factory-wipe-methods-for-tablet-pc/ Hard resetting the Samsung Tab 2 will delete all the user data. The method for hard reset is 1. Switch off the tablet 2. Press the volume + and power button together 3. In appear menu select the option data wipe 4. Then select delete all user data For more info on hard reset check the above link