I tried searching for this but didn't find anything helpful.
Basically, I removed the IT policy from my used BlackBerry without a problem, but the firewall is still locked on with no way to disable it in the settings. This means I can't run Opera Mini, as it comes up with a firewall error during the install process.
Save the numbers of your contacts to the sim card phone book first in case you really need to keep them, also, see if you could write down the into on your device that's in the contacts. It's a pain to enter it all over again if the restoring causes the same thing. You'll have to go clean.
Posted from my CrackBerry at wapforums.crackberry.com