I have decided not to sell now. I see a lot of people selling the iPhone 4 just to get the iPhone 5. However the way I see it, I am sure 99% of all features of the IOS 5 will work on iPhone 4, so then thinking why sell? Okay I was thinking about the antenna issue etc. However since the bumper fixes that Issue, I thought hey might as well just upgrade when my upgrade date comes which is in August 2012. Then I am thinking that my network O2 normally brings out a good early upgrade deal anyway, so hmm will just see what happens and stick with iPhone 4 for now. What is everyone else thinking of doing?