iOS 9.0.1 it is no longer signed for installation by the company Apple Lossless Audio CODEC (ALAC), starting today, those in Cupertino blocking during this morning the signing of SHSHs for iPhone, iPad and iPod Touch users.
Practically any person who tries to do downgrade iOS 9.0.2 to iOS 9.0.1 or upgrade directly to iOS 9.0.1 it will only have an error displayed in iTunes by which it is announced that it can no longer do this procedure and unfortunately there is no method to install iOS 9.0.1 at the moment.
It was expected that Apple would block the signing of SHSHs for iOS 9.0.1 since more than a week has passed since the time when iOS 9.0.2 has been officially released to users, so probably few people are surprised by this unexpected blocking of SHSH signing.
Having said that, starting today you will only be able to install iOS 9.0.2 on iDevices released in recent years on the market, so do not try to do anything else because it will not be possible to install any other old version of the operating system for iPhones, iPads and iPod Touches.
