If you tired of looking the AT&T animation, just replace it with nice and smooth Nexus Prime boot animation Find it here, download, edit desc file, put the frame size 540 960, fps rate to 29, push the bootanimation.zip to/system/media/ using root explorer and enjoy! It works perfectly on Atrix 2, confirmed. I use it already. I used it also on Inspire 4G before. Disabling boot animation through build.prop does not really make sense from boot time perspective.