Hard Reset iPhone 6S Via Keys Combination
https://gsmfixer.blogspot.com/2016/03/hard-reset-iphone-6s-via-keys.html
Hard Reset iPhone 6S Using Hardware Keys to Remove Viruses and Solve iPhone 6S Slow Spedd Problem. Apple iPhone 6S Hard Resey Will remove the security locks and phone settings will be changed to as new Phone. So keep a secure backup of data before doing factory reset or hard reset Hard Reset iPhone 6S.
Now Power Off Your iPhone 6S.
Press and hold the Power button for about 3 seconds.
Next press and hold together Home button with Power button for about 10 seconds.
Quickly Release Power Button Only.
When you are alerted by iTunes saying that it has detected a device in Recovery Mode, then release Home button.
Accept All Options and Wait Until the Operation is Completed.