Jailbreak IOS 8.1 To 8.4
Supports all Apple devices running iOS 8.1.3-8.4 (iPhone | iPad | iTouch | iPod)
TaiG Jailbreak Tool V2.3.0 released in July 3rd, 2015. This version integrates Cydia 1.1.19, which is perfectly compatible of iOS 8.3-8.4, and removes seteuid patch.
Download TaiG Jailbreak V2.3.0
Alternative Link (MediaFire)
You should have iTunes v12.0.1, if not Uninstall all Apple software, Bonjour, Itunes.
Next, navigate to your local disk (c:)>users>your name>Music and rename the iTunes library or delete it. Finally, reboot your PC and install iTunes 12.0.1 from the below downloads.
iTunes v12.0.1 (Win 32Bit)
iTunes v12.0.1 (Win 64Bit)
Turn off passcode and Find My iPhone:
To turn off passcode,
go to Settings > Passcode > Enter your passcode > Turn Passcode Off > Enter your passcode.
To turn off Find My iPhone,
go to Settings > iCloud > Find My iPhone > Click to turn off.
-First of all in this step you should backup your mobile, incase of any problem use this link to download and restore your IDEVICE (http://ipsw.me/).
-Unzip TaiG Jailbreak Tool from step 1 (TaiGJBreak_EN_2300.zip), Run TaiGJBreak_EN_2300.exe as Administrator.
-uncheck 3k Assistant, keep Cydia box checked. Start to jailbreak.
Click Start to jailbreak. keep your device well connected and wait patiently.
If there is any issue during the jailbreak,Try the previous steps again, do not use your mobile while you are in Jailbreaking mode .