I just upgraded my iphone 4 to OS 4.1 while preserving the old baseband with TU, and applied limera1n/ultrasn0w (I'm using t-mobile). Now I can't get the push notifications to work. I even followed these instructions, but none of them are getting through: http://www.ihackintosh.com/2010/03/push-doctor-free-push-fix-for-hacktivated-iphones/ Any ideas? I've been searching everywhere and can't find anything! Thanks so much!