Hi im just new to apple devices and iOS stuffs
i got an ipod touch 4g from a friend and its jailbreak iOS 4.2.1 i dont know if its jailbreak everytime i click cydia it just open and do nothing and close
just a bit of research the good for this one is iOS 4.3.3 can i update onto that one?
sry im just a newbie here
iOS 4.2.1 is actually a great version for the 4th gen. I run it on mine personally, but I don't use many apps at all. Mostly for music.
4.3.3 is also good as it opens it up to newer apps and safari is improved, though it has a little less free ram.
Anyway, you can go to 4.3.3, but ONLY if you have SHSH blobs for it. Such as if it was on it at one point or jail broken on it you may be in luck. Most likely though, the previous owner never went beyond 4.2.1. In that case the only place you can go is to 6.1.5. Or save the SHSH using tiny umbrella (probably from cydia's server) and restore 4.2.1 to get it working properly.
For instance, I've jail broken and saved almost every version of iOS I've been on. So I have SHSH blobs for 4.2.1, 4.3.3, 5.0.1, 6.1 etc. so I can freely switch between them. But I'm in the minority.
Another thought is that cydia's is just messed up and you might be able to fix it by rerunning the jail break tool. I think it was greenp0ison or something for 4.2. It's been a while.