Hi i have an iphone 4 on firmware 4.3(8F190) and I am trying to jailbreak and unlock the phone so i can use it on Tmobile. I'm really new to this so I just need some guide. So far I have gone to jailbreakme.com and downloaded Cydia and following that I also downloaded ultrasnow 1.2.3. 1. What do I need to do after this ? 2. Is there another source I have to add to configure the internet ? 3. Also I don't have the Cellular Data Network option in Network in my settings. Also I have not put in a SIM card bc i'm trying to make sure my iphone 4 is really unlocked and jailbroken b4 I cut my SIM card.