I updated to the latest iOS 5.1. I forgot if this is also present in iOS 5.0.1 but is there an "Enable 3G" option back in iOS 5.0.1 in the Network Settings? I can only remember seeing "Cellular Data" (On/Off) but not the "Enable 3G". But if there is an "Enable 3G" option before, forgive me short memory. Here's my question, should I set that "Enable 3G" option to On? I surf the internet using my iPhone 4S (Factory Unlocked) using my Wi-Fi connection here at home but I don't surf the internet using my mobile carrier. So should I turn that On? Or should I leave it turned Off? Also, what does that "Enable 3G" option do? I mean what does it affects? Will it affect my text messages and calls? Or only my internet browsing speed? Thanks!