IPhone: "Slide to Answer" and "Accept and Decline" button's mystery solved!

Are you an iPhone user? If you are then this will blow your mind.

Have you seen this on your screen whenever someone is calling?

Or maybe this?

Then why is it different? Why sometimes you see the “slide to answer” and at times you just have to press the green “accept” button to accept a call?

It has nothing to do if the caller is using an IOS or an Android device or even if the contact is saved on your phonebook.

Here’s why. Ready?

If your phone is locked and someone calls you, you’ll see the slider. And the phone is unlocked and somebody is calling, you’ll see the “Accept” and “Decline” buttons.