Issue while restoring iPhone 6S

Hi Folks,

I m having trouble while restoring my iPhone 6s. I have followed the exact processs which was mentioned in the Apple support (https://support.apple.com/en-us/HT204306) where I can even see the popup with three options i.e. Cancel, Restore and Update. As soon as I click on Restore it takes some time to enable the process on iPhone and then restarts at its own (which is exactly mentioned in the above support link).

Once restarted, it again gives the same passcode screen on my iPhone instead of giving the home screen to register it once again.

Please suggest if anybody has faced the similar issue.

Regards,

Sandeep