Anyone have solution to my problem? I have two iphone 4. One belongs to my wife and one mine. My wife's Iphone 4 updated and upgraded to ios 4.3 with no problem and the personal Hotspot selection is found in the setting. But mine do not even have the Personal Hotspot tab in the setting at all. Both my wife and me have the same service provider. I updated (to iOS4.3) my NON network locked Singapore Mobile 1 iPhone 4 32GB which is running on autoroam in USA and after the update was done, I lost the option to do Internet tethering. Prior to this I was running the phone and the option was available. In my Iphone 4, I went to setting and there is no "Personal Hot Spot" tab as shown in the other iphone 4. And when I go into "Settings > General > Network" the Personal Hotspot keep wheeling. Anyone have solution and why the difference? What should I do?