Does the update have to be done through the computer? I can't seem to get it to work through my phone, as it just comes back with the message that there's no update available even though I'm running the 1.5 version. I've been lazy and procrastinated doing the update, but my phone has just been crazy slow at times lately, so I'd like to give the new version a shot. Will a Sprint store do the update for me? Totally in the dark here as to what needs to be done, and I feel like a moron.