Why Your iPhone Shows 'Accept/Decline' Screen On Some Calls and 'Slide To Answer' On Others

Ever notice two different 'receive call button' appear on your phone?

-- You get this when you are on your home screen and the phone is unlocked. You have the option of receiving or declining.

-- You get this instead of the 'accept/decline' buttons when your iPhone is locked.

Ever Wondered How to Decline a Call When It Shows The Slide to Answer Screen?

-- It's simple. Just press the lock button twice.

Did you just noticed or you've known this since? Kindly Share and Comment.