Helping a friend to unlock and jailbreak iPhone

My friend is trying to decide which iPhone to buy to unlock to use on T-mobile network. I heard that after jailbreaking, it is not possible to unlock anymore, is it true? I told her to buy a 3GS so that she has a better chance to get an iPhone with an iOS other than 5.0 and a processor other than A5. Did I tell her wrong? Thanks for replying.

所有跟帖： 

• 較新的3gs解鎖後gps完蛋。 -fitwxc- ♂ (0 bytes) () 11/17/2011 postreply 09:24:51

• I don't think she cares about the GPS. She wants an unlocked iPh -jiuge- ♂ (0 bytes) () 11/17/2011 postreply 10:09:55

• 回複：I don't think she cares about the GPS. She wants an unlocked -jiuge- ♂ (301 bytes) () 11/17/2011 postreply 13:59:07

• 我印象中是:不越獄的話，如何能裝解鎖的app? -fitwxc- ♂ (0 bytes) () 11/17/2011 postreply 17:02:59

• 她是想用T-mobile -jiuge- ♂ (0 bytes) () 11/17/2011 postreply 19:39:46

• 解鎖要用一個特殊的app, 隻有越獄後才能裝這個app -fitwxc- ♂ (0 bytes) () 11/17/2011 postreply 22:51:35