Rumors say that iPhone5 will have the same form like iPhone4.
http://iphone5new*****log.com/2011/09/12/sub-4-inch-iphone-5-screen/
Will you upgrade to iPhone5 ?
I actually hope iPhone5 comes with 4" display with 720P resolution. If iPhone5 has the iPhone4 form(3.5" display and same resolution), it's not that exciting to upgrade at least to me.
If this is real, I will consider Galasy SII, which has the best display in terms of color though its resolution is a little low, and very powerful CPU and good quality camera chip for video and photo.