Thank you for reading this. I noticed yesterday that in places where I know definitively that Wi-Fi exists, such as at work and at home, my iPhone stays on the Edge network. If I go to Settings, the Wi-Fi listing is grayed out, as if to suggest it is no longer an option for me to use. Has anyone else had this problem. It is as if either I (accidentally) or the iPhone itself flipped some sort of switch that bars the use of Wi-Fi. Please help if you can. Thank you.