thanks for reply. but i have a problame after i install jailbreak and when i reboot my iphone it's dont work it's gose to recovery mod and i have hockup with computer and restore it again so if u can help me with this problame. thanks
Do a search for "tethered jailbreak." When it does that, you just have to run Blackra1n again. (You'll have to do this every time you reset your phone.)