download file here : http://easyfreedl.com/Ezra9216/iPhone How to jailbreak iPhone 4G(ios4) using Limera1n: First you should look for your firmware(os) if it is ios4 than ok if you are running iphone 3G(firmware 3.13)or other than you should first install the latest firmware that is 4 or 4.01 here the link of firmware of ios(iphone 4)