Can you change a passcode for your iPhone remotely
Locked my phone and can't remember my passcode
Then click on the link provided, follow the directions and restore your phone. The screen lock passcode is purely local to the device itself. The only methods to reset it are to restore the device in iTunes or, if find my iPhone is enabled, execute a remote erase from your www.icloud.com account web page. That’s it - there are no other options.