I started to download iOS7 from my iPhone 4, and then I read about lots of lag and battery issues. I'd love to try iOS7 but since I won't be able downgrade to iOS6 I'd like to cancel the download. The problem is I don't know how.
I've only been able to stop the download by disabling Wi-Fi.
How can I cancel the download of iOS7? Am I doomed to never be able to use Wi-Fi again?