I am a new-hand on JB. I have an iphone4 come with firmware 4.2.1 I have gone through the threads in this forum and knowing that backup the SHSH with Tiny Umbrella. 1) My problem is, I can sucessfully backup the 4.2.1, 4.3b2, 4.3b3 SHSH. but in the log tab of Tiny Umbrella, it shows that failed in backup the 4.3 SHSH, below is the error messages extract from log : 03/26/2011 18:02:41.687 CYDIA DOES NOT HAVE YOUR SHSH FOR iPhone4 4.3 (8F190) THERE IS NO WAY FOR YOU TO GET THEM. SORRY. YOU ARE JUST TOO LATE Please help how can I backup the 4.3 SHSH file 2) How can I upgrade my firmware to 4.3, as presently Apple is not signing firmware 4.3 How can I upgrade my iphone firmware from 4.2.1 to 4.3 Thanks a lot for any help !!!