Downgrade iOS 8.3 / 7.1.2 to 8.1.2 / 6.1.3/4 - Without SHSH - A5+ iPhone 4S, 5, 6, 6+ ~ InsanelyiPho
[Also applies to same corresponding iPod and iPad Chip. ] iPSW tool supports Apple A4, A5, A6, A7 and A8 devices, however you cannot downgrade to any version of iOS 6 on A7 devices but still you can switch to any version of iOS 7 on these devices....