To by pass the codes on your iPhone connect it to a computer that you last synchronized with and restore the setting. Another way is by plugging the iPhone in, hold the power key and then slide to power off. Press the power button, immediately as the apple logo appears push and hold both the top power key and the home key together until the orange triangle appears. This ought to put the iPhone into restore mode and open iTunes to restore the pass code.
You cant unless you taker it to a corporate store to have techs access phone or u can possibly call customer support and if your willing to they might help you perform a hard reset witch deletes everything except SD card data