I update to 4 today and I do not care for it. I like my 3.1.3 my phone was much faster on the net in every way possible. I don't like how in setting the Tethering is running and what looks like it's wanting to me to sign up for it. I'm not losing my unlimited data plan and paying an extra fee for tethering. I have internet at home don't need or want tethering. I called Apple and they tell me no possible way to downgrade to 3.1.3... I think everybody who has a problem with this we need to fight back in some way. I don't like People telling me what to do. I paid for the phone and I pay for the overpriced service to run the phone, I want my 3.1.3 back. Why is Apple so against going back if you aren't happy with the current 4??? It doesn't work as well on my 3Gs as 3.1.3. What in the hell is the deal with Apple?