Hi i want to jailbreak my iphone 3G (i know it's old but can;t afford a new phone). I've been trying to jailbreak using Greenpois0n. But my phone can't go in DFU mode. Is there an easier way to do it. Many of my friends jailbroke their's but i'm having trouble with mine. Greenpois0n crashed my mac a few times and also i can't get in DFU. Are there 2 steps to get in DFU mode? mine is going on recovery mode. Should i try DFU by first turning the phone off or phone on. My home button is not as it use to be so mayb this is the problem Please help me to jailbreak my iphone 3G ios 4.2.1. Cheers.