What will happen to my iPhone 4?

My iphone 4 is already jailbreak if i update it to iOS 6 will my jailbreak gone? I purchased my iphone 4 in Softbank mobile Japan. So it's not unlocked. By the way jailbreak and unlocked is the same? Or not? And why? Can you give me a full explanation. I want to update my iphone but i'm worried if the jailbreak will be gone? And if i update my iphone it bring me to a big problem like bug? Or anything?

You should go to iphonunlocker.com, they have awesome software that works with all the iOS including the 6, as well as step by step instructions to jailbreak and unlock your iPhone. I used there service on my iPhone 4 and worked like a charm.

Yes your jailbreak will be gone if you update, but if you update to iOS 6.1.2 you'd be able to get it back easily using evasi0n.

No jailbreak & unlock are 2 different things. Jailbreaking is hacking the OS. Unlocking is removing the 1 carrier restriction on the phone.

No, updating will very much lessen your chances of things like bugs.

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