Hey guys, I noticed that WiFi Sync on my 4S doesn't always work properly. Sometimes I do, sometimes I don't get the WiFi sync option available on my 4S (grayed out). If I try to sync from my MBP through Wifi, sometimes it fails to do anything. Most of the time, when I download new apps through iTunes on my MBP, they don't automatically sync to my 4S even though I have the box in the Apps menu in iTunes checked off. For the record, all these features are working perfectly fine on my 2-year-old iPod Touch. Any idea what it could be?