One of the lag issues I've had with this phone happens right on the home screen, while trying to unlock, and even when trying to answer a call, etc. It always stuttered. I wasn't even using a live wallpaper, just a static picture I downloaded. But I recently switched my wallpaper to some boring stock wallpaper, and the thing became so fluid and smooth. I wonder if this is an inherent problem, or because downloaded wallpapers are stored on the SD card as opposed to main memory. Just a tip. I will stick to using stock static wallpapers personally.