I am a developer and I partially want to test my app in iOS 5 but more than that I want to try iOS 5 out of curiosity. Since I am a poor grad student who only has access to one iPhone, I am wondering if I would be able to downgrade my device back to iOS 4 if iOS 5 isn't stable enough for every day use. I know that with iOS 4 you could downgrade back to iOS 3 but you'd be stuck at the newer baseband (which was not an issue for me since I don't use a carrier unlock). I assume backing up my SHSH blobs would be a good idea, but does anybody know for sure whether iOS 5 is downgradable or not? I know it's probably a bit too early for people to report on this but I thought I'd start a thread that could continue once people actually try to downgrade.