1. Is a untethered 4.0 Jailbreak for an iPhone 3G out yet? I just need to know if it is, because I was looking to update. I also read how people were having slow phones because they had the multitasking enabled. 2. Is it possible to unlock an iPhone 3GS[No sim card] that's already on 4.0? My friend wants me to do that for his so that he can use his phone via T-Mobile. Thank you so much in advance.