iPhone Jailbreak only for this scenario... Am I correct?

hansgmuny

macrumors newbie
Original poster
Mar 23, 2013
9
0
los angeles
iPhone 3G
unlocked and service with tmobile currently.
iOS 4.2.1
BB 5.15.04
Win XP pro SP2

from all the reading online i have hopefully reached the right conclusion.
all i want is a jailbreak. since i am already unlocked and have service w/tmobile, i shouldn't have to upgrade to iPad BB 6.15 for the unlock. but i am not absolutely certain.
considering all the little things that seem to pop up, i was hoping to get validation either or.
if i can just do a jailbreak any suggested program.
 

hansgmuny

macrumors newbie
Original poster
Mar 23, 2013
9
0
los angeles
Applejuiced,

thanx 4 your reply.

If I am going to use redsnow for the JB do I have to use a custom IPSW in order not to upgrade the baseband?