One of my colleagues updated her iPhone 4 to 6.0.1 the other night over wi-fi and since then She has been having major issues with her Internet connection. It's been showing 3G is on but it's not doing anything and it's also very intermittent about picking up Wi-Fi networks. She has tried turning the phone off and on again but with the same result. I'm now reluctant to update my iPhone 5 software in case the same thing happens to me. Is this a known issue with the new iOS?