My iMessage took a while to catch up, but it's working fine now.
I just updated my iPhone 4 to iOS7 and I have to say it looks a bit like my Android HTC from 2-3 years ago, I now have a HTC One x+ which got a minor upgrade recently too and put it even further ahead of Apple IMO. Not overly impressed so far as it still seems a year or two behind. Just my opinion but I use both formats regularly and I much prefer android.
I just updated my iPhone 4 to iOS7 and I have to say it looks a bit like my Android HTC from 2-3 years ago, I now have a HTC One x+ which got a minor upgrade recently too and put it even further ahead of Apple IMO. Not overly impressed so far as it still seems a year or two behind. Just my opinion but I use both formats regularly and I much prefer android.
Howd you get ios7 on a 4 mine says its Upto date on iOS 6.1.3