When I answer phone calls on the X, sometimes there is the option to just push the answer or decline "button" and other times it is a slider. Why the difference, I prefer the "button" option.
It depends on the phone's state. When the phone is in standby (requiring you to unlock it to use it) you get the sliders. When the phone is active you see the buttons.
not sure about your question, but it has the slide to answer feature when locked to make it that much harder to answer a call in your pocket. I personally like it that way. Helps eliminate any mistakes.
Wow ... Thanks for answering that! ... It was driving me crazy ... LOL .. My OG Droid always had the sliders .... Know I know and it won't drive me nuts anymore