LG C375 Cookie Tweet hard reset
Reset settings (Menu > Settings > Reset settings) – Use Reset settings to restore the factory settings. You need the security code to activate this function. The default number is “0000”.
To reset your LG C375 Cookie Tweet phone to factory settings and erase all the data on your phone, touch Menu > Settings> Privacy > Factory data reset > Reset phone.
You can use LG Mobile Support tool to repair your LG cell phone, after download select menu Customer Support > Recovery Phone
If you know hard reset using buttons pls share in comment.