iOS 4.0.1 Software Update

The iOS 4.0.1 Software Update improves the formula to determine how many bars of signal strength to display on iPhone 4, iPhone 3GS, and iPhone 3G. The real signal strength remains the same, but the bars on iPhone will indicate it more precisely. Learn how

My bandwidth is 1 Mbps.
I took about 50 mins to download iTunes.
I took 45 mins to update to iOS 4.0.1

My next post will cover about multi-tasking apps which is not so obvious at first (Double-click Home Button).