I have a 3GS that I unlocked a few months ago on 4.3.3. I had to unlock it and I think it put the iPad baseband on. Fast forward to today and I updated it to iOS5 GM, but forgot the iPad baseband was on, and it won't activate on itself or through iTunes - the phone says it just 'can't', while iTunes says there's no SIM inserted. I bet this is baseband related, and was wondering if there was any way I could force the old 4.3.3 back on, and then be able to maybe push the original baseband back on. If not, I'd at least like to be able to downgrade it to 4.3.x so I can use the damn thing (it's useless right now). Any help appreciated. iTunes just gives me errors, TinyUmbrella in any state is being unhelpful (I do have SHSH for 4.3.3 saved). I've tried 4.3.3 and 4.3.5.