Hard Reset LEMON P2

Turn on the device.
Now connect your phone to PC or laptop.
Then download Android Tool and Drivers, for example from this website: https://www.google.pl/search?q=android+tool+and+drivers&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:pl:official&client=firefox-a&channel=sb&gfe_rd=cr&ei=S5xsU_HrB8za8gfFoIGwBw
Next you should install drivers which name is: "SCI android drivers" and "ADB Android Drivers".
Open tool and press "5" and hit Enter key to "wipe data/factory reset".
Afterwards your phone will reset and reboots.
Success!

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.