I just bought an iPad 2 and have trouble with wifi losing connection after 15-20 minutes. Wifi is fine on my other devices. When I search forums, I see a lot of discussion on this issue, but they are old threads from 2010 to 2011 and refer to iOS 4.3. Is this still an issue on iPad 2running iOS 5.0.1? I would appreciate advice to decide if I have a faulty unit I should return or if there is a fix. Thanks.