How to reset an iphone 6s or 6 without password?

How to reset an iphone 6s or 6 without password?

You need to enter DFU mode:

- Plug your device into your computer with a USB cable.
- Turn off the device.
- Hold the Power button for 3 seconds.
- Hold the Home and Power buttons for 10 seconds.
- Release the Power button but keep holding the Home button.

After about 15 seconds you will be alerted by iTunes saying that it has detected a device in Recovery Mode.

From there you can just restore via iTunes as it will bypass the passcode