Why wont my BlackBerry Curve 8520 download App World?

Below are the requirements for accessing the store- I'm pretty sure you meet the first two, so I would think maybe it's the last one. Are you just using WiFI, not a data plan to access the net? That would cause the issue. If you are on a data plan than you would need to contact your cell carrier for them to give you access to it. BUT, I personally prefer to get my software from the web and download onto my PC. You can for example go to: http://syncpedia.com/blackberry I like that better because you can backup your software on your PC or on a CD, and if you ever lose or break your device you still have a copy. Whereas on the online app store you load it once and are at their mercy. To do the pc method you would just download the desktop software: http://na.blackberry.com/eng/services/desktop/ And get a usb sync cable for your blackberry to the computer, and then use the desktop software to transfer the downloads from your computer onto your device. Online store requirements: 1. BlackBerry® Device Software version 4.2 or higher 2. BlackBerry smartphones with trackpads, trackballs or SurePress™ touch screen 3. To use BlackBerry App World, you require a service plan that includes access to the BlackBerry® Browser

Try a different method of installing the BlackBerry App World. If you are downloading the BlackBerry App World from your BlackBerry Browser then try installing the BlackBerry App World using the Desktop Manager. Or viceversa.