enable facetime on iphone 4 over 3g without 3rd party apps
open /System/Library/CoreServices/SpringBoard.app/N90AP.list
with ifunbox
add key:
<key>3Gvenice</key>
<true/>
save and restart
open /System/Library/CoreServices/SpringBoard.app/N90AP.list
with ifunbox
add key:
<key>3Gvenice</key>
<true/>
save and restart