Hey everyone, Just sharing my experience with iOS 4 on iPhone 3G...... the responsiveness of the phone is pretty low and the apps struggle at times...... After countless reboot, switch on swtich off because the phone keeps hanging in the middle of using an app.... or hanging trying to put the access code when you unlock the phone (not hack.... 4 digit unllock) sometimes noticeabe lag time between input and actual event occuring.... I have a feeling that its better to revert to OS 3.1.3 where I was before I went to 4. Atleast the phone was quite responsive and worked ! I don't know how your experience has been with the OS upgrade. it just feels like Apple allowed the 3G to be updated out of curtousey and possible PR value knowing that the configuration of 3G is not goingto be able to handle iOS4 (you see the number of features that are not available anyway).