Hello, I did the at&t 4.3 update and I must say I absolutely love it. There is one little thing I found that I wanted to see if anyone else is experiencing. Before the update when I would be using the phone and want to turn it off or let's say put it to sleep I just press the power button on the right hand side of the phone, and the phone would make a sound telling you it was going to sleep. After the update when I press the power button to turn it off no more sound, I checked the settings and the box is checked off, restarted phone no help, it's not a big deal just wondering if others are experiencing this??