How do I do a hard reset without the pass code?

Connect the iPhone to its syncing computer and restore via iTunes. If iTunes asks for the passcode and you can't enter the passcode or you do not have the syncing computer, place the iPod in recovery mode and then restore, For recovery mode:

iPhone and iPod touch: Unable to update or restore

You can reset the iPhone, by holding the home and sleep buttons until you see the Apple logo.

If you can't remember the passcode though, you'll have to restore the iPhone.

For more info about passcode locks, see this Apple doc-> iOS: Device disabled after entering wrong passcode

If your wanting to reset the phone, you hold the home and off button down until the apple symbol comes up. If you want to restore the phone you connect to itunes to restore.

The home button is the ONLY button on the front of the phone. The Sleep/Power button is the ONLY button on the top of the phone.

i locked my iphone 4s and i forgot my password how do youu reset it

You don't reset it. You restore the device. See the instructions in this support document. If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support