I upgraded to iOS 4.3 GM last night on my iPhone 4. Previously to this on each software version I have used, I will keep 1 bar of 3G signal in my house, but this often drops down to Edge. Since upgrading, the 3G signal sits at a solid 3 bars, showing increased speed on speed tests and has only dropped down to Edge once. Similarly, while shopping, my phone shows 5 bars of signal, where previously on 3G it showed only 2. Has anyone else noticed this drastic 3G enhancement?