Hi, I have an iPhone 3GS that I'm trying to jailbreak for my brother, it SAYS it has 4.2.1 installed, but it doesn't have multitasking, backgrounds, battery percentage, or any other features of 4.2, last night I tried to jailbreak it with GreenPois0n, but it wouldn't work. So I tried to restore to a clean copy of 4.2.1 (from apple) and it says it can't restore because it's incompatible.. The only thing I can think of is maybe I messed something up a while ago, trying to jailbreak it with RedSn0w, but idk, can anyone help me "restore" this to 4.2.1.
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