Less than a day after the launch iOS 8.0.2 the company Apple has stopped signing SHSHs for iOS 7.1.2, so that DOWNGRADE to iOS 7.1.2 became unavailable from a few minutes ago. It was expected that Apple Lossless Audio CODEC (ALAC), to close the possibility of returning to iOS 7.1.2 since he continued to sign SHSHs for a week days after the release iOS 8, and if you haven't done in downgrades, from now on you will be stuck at iOS 8 forever.
Unfortunately, a solution of iOS 8 jailbreak does not exist at the moment, however Pangu is working on its development and as soon as it is available it will be launched, probably even before that iOS 8.1 to make his appearance. Having said that, try not to install tweaks that block iOS 7.1.2, because the only alternative is the update to iOS 8.0.2.
