Reset iPhone Passcode

Click on the following link and see the instructions there: If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

FoxFifth has provided you with a link on what you need to do to unlock your iPhone when you either forget or try to enter the wrong passcode too many time. Apple cannot, or more accurately, will not, assist you with unlocking your phone.

Note that the process in the provided article will take you through the steps to restore the phone. This process will completely erase the phone and the only way to restore your phone's data would be from a backup.