Apple’s support page for specific errors on iTunes isn’t all that helpful. For starters, Apple isn’t all that interested in people downgrading their iOS firmware. So naturally, all the signing is already done...
Author: admin
How to Enable Developer Options/USB Debugging Mode on Devices with Android 4.2/4.3 Jelly Bean

Most of the time whenever you would like to flash or upgrade your Android device via flash tool or whenever you want to Root your android device you need to enable USB debugging mode...
How to Untethered Jailbreak iOS 6.1.3, 6.1.4 & 6.1.5 with p0sixspwn on All Devices
For folks who have chosen not to upgrade to iOS 7 but are stuck on iOS 6.1.3/4/5, untethered jailbreak was not an option until now. The team involving @iH8snow, @winocm and others has released...