HELP! My sister has an iPhone 4 that has been great for over 2 years now. She updated to iOS6 when it was released with no problems at all. She then updated to 6.0.1 and now can not turn wifi on. That is, the wifi toggle switch does not respond, it is always 'off'. We have tried (well, I have suggested, she has tried!) the following: reset network settings - nope reset all settings - nope erase all content and reset all settings - nope restore and set up from backup (itunes) - nope restore and set up as new device - nope At this point I am stuck. What could have caused this? (I suspect 6.0.1!) and how can she fix it? I have suggested she waits a few weeks hoping for 6.0.2 update and maybe that will fix it but if that is a long way from release or doesn't fix it, or maybe there is something she can do to fix it then that would be better. Can anyone help please?