Any downgrade for iphone 4 to ios 6? Iwont sacrifice smothness of ios 6 from laggy ios7

sorry, not possible. look at these tips to try and speed it up: http://osxdaily.com/2013/09/23/ios-7-slow-speed-it-up/

Apple policy does not support downgrading from the current operating system to a previous version. This is because newer operating systems contain many bug fixes and firmware upgrades that are difficult to roll back.

all you have to do is TURN OFF "Documents and Data" in icloud settings on your phone. PROBLEM FIXED!