After updating to iOS 5.0.1 i noticed that GPS/Location services doesn't work unless i use WiFi or Celular Data. It worked when i was on 4.3.3 without Wi-Fi or Celular Data. Apps such as MAPS don't work unless i have Wi-Fi turned On, which wasn't needed before. Pedometer Pro GPS also says i don't have a GPS (GPS is not supported by your device), no matter if i have Wi-Fi or not. I've used Redsn0w 0.9.10b3 and i'm on iPhone 4.