How to Hard Reset NOKIA C7 to Unlock Security

Switch on you mobole by power button.
Hold and press Volume Down + Camera button + Home key + Power button until you see logo Nokia.
Now tap your lock code. (The default lock code is 12345).
After this operations your phone will reset and maybe restart.
Done!
Hard Reset by Code:
Switch on your mobile and dial *#7370# and you will see, that your phone is resets and reboots.