I know you guys are sick of these questions but I searched and just want to double check: I have: iphone 4 GSM baseband 4.10.01 Currently running 4.3.3 I've preserved the baseband and looking to upgrade to 5.1. The only issue I have is that I have not saved my shsh blobs from what I understand I can no longer do it. Can I upgrade to 5.1 without saving SHSH blobs? Thank you. EDIT - Also I am not looking to jailbreak.