Has anyone taken the phone back since 4.1 came out? I tried before and the Genius guy told me to wait until after 4.1 came out. Well, I killed my JB so I could have a functioning proximity sensor and updated to 4.1. However, I'm still having issues with it. I'd like to know what someone else's experience has been with the Genius Bar. Are they exchanging them out now? I just don't want to waste my time by making an appt and driving to the store. Thanks!