Did this occur while you were updating the os on the phone? If so, search for the 'how to recover a dead berry' post or the 'jl wipe' post and follow those to get your loved berry back to normal!
Posted from my CrackBerry at wapforums.crackberry.com
You need to reboot your computer and reload the operating system on your device again. What it means is you got to options/advanced options/host routing table then hit menu and register it with the network.
Posted from my CrackBerry at wapforums.crackberry.com
it's been on the loading screen for a little while after it said my upgrade finished, how long is it suposed to be on the screen? but i guess where i installed the new os it might take a while... idk.