Thursday evening Apple releases iOS 5.0.1 in iTunes for iDevice owners and MuscleNerd informs us that we will no longer be able to downgrade to iOS 5 because the SHSHs saved by us become useless in front of the new restore system implemented by Apple. Exactly one day after the release of iOS 5.0.1, Apple closed the possibility of restoring to iOS 5 so that no user, regardless of whether they have SHSH partially saved with redsn0w, can currently restore to iOS 5.
If the Dev Team will find a solution to restore to the old version of the operating system, then you will be able to restore without problems, but if this does not happen, then we may not be able to do untethered jailbreak if we do not have iOS 5 installed . Whatever the situation, don't try to restore to iOS 5 starting today because this is impossible. Only on iOS 5.0.1 you can restore without problems. From my point of view, the measure implemented by Apple is beyond the limits of normality. Users should be able to restore whatever they want without restrictions.
