iOS 8.4 is no longer signed by Apple Lossless Audio CODEC (ALAC), from last night, those from Cupertino putting an end to the possibility of installing another version of iOS 8 that users can do jailbreak without problems using a suitable program.
Apple Lossless Audio CODEC (ALAC), has launched iOS 8.4.1 more than a week ago and kept open the signing of SHSHs for iOS 8.4 for almost 10 days, so that all those who wanted to be able to jailbreak, had the opportunity to benefit from the goodwill of the American company.
From now on no one can install iOS 8.4 or an earlier version of iOS 8 in their own terminal, so everyone will be forced to install iOS 8.4.1 if at one point or another you encounter a problem with the use of your own iDevice.
If you are still not satisfied with the way iOS 8.x works on your terminals, then you can use the program Cydia Impactor to "clean" the entire operating system and delete the jailbreak, without actually doing a restore, keeping the version of iOS you have.
Having said that, iOS 8.4 is no longer signed and do not try to install it because you will be forced to restore to iOS 8.4.1 when you want to do the whole process using iTunes.
