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IOS 4.2 unlock


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Nov 24, 2010
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I have an iphone 4 IOS 4.1 unlocked, my question is that do i need to unlock it again when i update to IOS 4.2??
You can preserve your baseband whilst updating. There are plenty of guides on google ;) I've never done it as I don't need an unlock, so can't help you myself.

Remember the current jailbreak for 4.2 is tethered. So every time you turn your phone off or have to reboot/restart it you will have to jailbreak it again...
how do I upgrade to 4.2
when I connect iphone 4 to pc nothing happens

problem solved, mobile device setting in itunes was not loading/missing
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click on ''check for update'' or on "restore" ! It's gonna tell you that there a new version of IOS & then just click on '' download & install " and then let itune do his thing !!!
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I've already update my ip4 to ios 4.2.1 but how to enable an airplay function?
As far as I know, you have to unlock iPhone IMEI even if you have updated it to IOS 4.2. If you don’t unlock your iPhone IMEI number, then you won’t be able to change your subscriber.