I originally purchased a 3G phone with 3.1.3 / 05.13.04..... Not knowing what I am doing, I updated to 4.2.1 / 05.15.04.... I know, I know, I am a dumbass...I shouldn't have updated the phone without looking into all possibilities... I regret so much. Everything on my phone is slow now..... * No, I didn't save my SHSH Blob for 3.1.3...... This is where I am now with the phone: I have jailbroken it with redsn0w Unable to unlock the phone for T-Mobile because 5.15.04 can't be unlocked.... I was suggested to upgrade the firmware to 06.15.00 to unlock it but warned that there is no going back from that version. Here are my questions: 1) Is there anyway I can go back to 3.1.3 or 3.1.2, unlock and jailbreak it, be happy with the phone? 2) If no, how bad is the Iphone 3G on 06.15.00 firmware? Can you tell me some of the issues 3G may have on that firmware? 3) What is my best option to have this phone unlocked, jailbroken and minimize the slowness?