I've never noticed this option. I found it under Options/advanced. I just upgraded my OS to 4.5. Is this new with the new OS?
If I click on it, it says: The wireless upgrade process consists of three steps: requesting the new software, downloading the software, and then upgrading the software on your Blackberry device.
I have AT&T and I have that option under Advanced Option...but it says I don't have any updates, yet my buddy who has T-Mobile had updates. Once again, AT&T is behind the times.