Download Geeksn0w for jailbreak your latest Ios 7.1 running iPhone. This is one and only best tool this time released to jailbreak your iPhone. Geeksn0w only support with iPhone 4 GSM,CDMA, Rev A. This is tethered jailbreak process and you need to reboot your device while jailbreak process going. Also you can download application to Windows platform. So MAC and Linux users need to move with Windows computer to jailbreak their devices.