OK, first off I have read the very helpful sticky on how to restore the phone to stock after a jailbreak, and am ready to do that. However, I need to understand the implications of the "basebands" before I do this and cannot now find where I read somewhere that if you dont do things in the right order or something, the phone can lose its baseband and end up as an expensive ornament!? I have jailbroken my iPhone 4 on 5.1.1 using Absinthe 2 (no issues and working fine, have installed a few apps and tweaks from Cydia, great). I have not unlocked with ultrasn0w (or anything else for that matter) The baseband was 04.12.01 (which is what the phone still shows in Settings), but when I connect the phone to iTools it says that the baseband is 04.11.08 (and the BasebandBootloaderVersion is ICE_2_13 if that helps?) I need educating in what these basebands mean please. If I follow the restore to stock instructions, will the firmware revert to 04.12.01 and my phone will behave just as it did before and be capable of a factory unlock? or is there something else I need to do (to get that baseband back) or to be aware of? Thanks in advance!